Microchip Technology MCP1630V Manuel utilisateur

MCP1630/MCP1630V

Features

• High-Speed PWM Operation (12 ns Current

Sense to Output Delay)

• Operating Temperature Range:

- -40°C to +125°C

• Precise Peak Current Limit (±5%) (MCP1630)

• Voltage Mode and Average Current Mode Control

(MCP1630V)

• CMOS Output Driver (drives MOSFET driver or

low-side N-channel MOSFET directly)

• External Oscillator Input

(from PICmicro®Microcontroller (MCU))

• External Voltage Reference Input (for adjustable

voltage or current output application)

• Peak Current Mode Operation > 1 MHz

• Low Operating Current: 2.8 mA (typ.)

• Fast Output Rise and Fall Times: 5.9 ns and

6.2 ns

• Undervoltage Lockout (UVLO) Protection

• Output Short Circuit Protection

• Overtemperature Protection

Applications

• Intelligent Power Systems

• Smart Battery Charger Applications

• Multiple Output/Multiple Phase Converters

• Output Voltage Calibration

• AC Power Factor Correction

• VID Capability (programmed and calibrated by

PICmicro®microcontroller)

• Buck/Boost/Buck-Boost/SEPIC/Flyback/Isolated

Converters

• Parallel Power Supplies

Related Literature

• “MCP1630 NiMH Demo Board User’s Guide”,

Microchip Technology Inc., DS51505, 2004

• “MCP1630 Low-Cost Li-Ion Battery Charger

User’s Guide”, Microchip Technology Inc.,

DS51555, 2005

• “MCP1630 Li-Ion Multi-Bay Battery Charger

User’s Guide”, Microchip Technology Inc.,

DS51515, 2005

• “MCP1630 Dual Buck Demo Board User’s Guide”,

Microchip Technology Inc., DS51531, 2005

Description

The MCP1630/V is a high-speed Pulse Width Modula-

tor (PWM) used to develop intelligent power systems.

When used with a microcontroller unit (MCU), the

MCP1630/V will control the power systemduty cycle to

provide output voltage or current regulation. The MCU

can be used to adjust output voltage or current, switch-

ing frequency, maximum duty cycle and other features

that make the power system more intelligent.

Typical applications include smart battery chargers,

intelligent power systems, brick dc/dc converters, ac

power-factor correction, multiple output power supplies,

multi-phase power supplies and more.

The MCP1630/V inputs were developed to be easily

attached to the I/O of a MCU. The MCU supplies the

oscillator and reference to the MCP1630/V to provide

the most flexible and adaptable power system. The

power system switching frequency and maximum duty

cycle are set using the I/O of the MCU. The reference

input can be external, a D/A Converter (DAC) output or

as simple as an I/O output from the MCU. This enables

the power system to adapt to many external signals

and variables in order to optimize performance and

facilitate calibration.

When operating in Current mode, a precise limit is set

on the peak current. With the fast comparator speed

(typically 12 ns), the MCP1630 is capable of providing a

tight limit on the maximum switch current over a wide

input voltage range when compared to other high-speed

PWM controllers.

For Voltage mode or Average Current mode

applications, the MCP1630V provides a larger range for

the external ramp voltage.

Additional protection features include: UVLO,

overtemperature and overcurrent.

Package Type

8-Lead DFN

OSC IN

COMP

VIN

VREF

VEXT

GND

OSC IN

COMP

VIN

VREF

VEXT

GND

8-Lead MSOP

(2 mm x 3 mm)

High-Speed, Microcontroller-Adaptable,

Pulse Width Modulator

MCP1630/MCP1630V

Functional Block Diagram – MCP1630

MCP1630 High-Speed PWM

–

VREF

Comp

–

OSC IN

VIN

COMP

GND

VEXT

2R R

VIN

2.7V Clamp

Overtemperature

UVLO

100 kΩ

0.1 µA

VIN

Latch Truth Table

SRQ

00Qn

011

100

111

Note: During overtemperature, VEXT driver is high-impedance.

Note

MCP1630/MCP1630V

Functional Block Diagram – MCP1630V

MCP1630V High-Speed PWM

–

VREF

Comp

–

OSC IN

VIN

COMP

GND

VEXT

VIN

2.7V Clamp

Overtemperature

UVLO

100 kΩ

0.1 µA

VIN

Latch Truth Table

SRQ

00Qn

011

100

111

Note: During overtemperature, VEXT driver is high-impedance.

Note

MCP1630/MCP1630V

Typical Application Circuit – MCP1630

+VBATT

MCP1630

+5V Bias

PIC16LF818

1/2 MCP6042

+8V to +15V Input Voltage

MCP1630 NiMH Battery Charger and Fuel Gauge Application Diagram

4 NiMH Cells

N-channel

1:1

SEPIC Converter

Cin COUT

A/D

PWM OUT

A/D

VDD

I2C™ To System

+VBATT

IBATT

ISW

5.7V

VDD

+5V Bias

1/2 MCP6042

VDD

MOSFET

MCP1700

3.0V

SOT23

GND

VEXT

VIN

COMP

OSC IN

VREF

MCP1630/MCP1630V

Typical Application Circuit - MCP1630V

Bidirectional Power Converter/Battery Charger for 4-Series Cell Li-Ion Batteries

Battery

Protection

and

Monitor

+VBATT

-VBATT

Bidirectional Buck/Boost

COUT

CIN

DC Bus

Voltage

SMBus

4-Cell Li-Ion

Battery Pack

Battery Protection

Switches

RSENSE

–

Boost Buck

Boost

Switch

Buck

Switch

SMBus

ISENSE

VSENSE

Fuse

GND

Sync.

FET

Driver

Comp

VREF

OSC GND

VEXT

VIN

–

+2.5 VREF

Charge Current Loop

DC bus Voltage Loop

0V to 2.7V

IREF Voltage (PWM) +

–

Filter

+DC Bus VREF

PIC16F88

MCP1630V

PS501

(1/2) MCP6021

MCP1630/MCP1630V

1.0 ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings †

VDD...................................................................................6.0V

Maximum Voltage on Any Pin ..(VGND - 0.3)V to (VIN + 0.3)V

VEXT Short Circuit Current ...........................Internally Limited

Storage temperature .....................................-65°C to +150°C

Maximum Junction Temperature, TJ...........................+150°C

Continuous Operating Temperature Range ..-40°C to +125°C

ESD protection on all pins, HBM......................................... 3kV

† Notice: Stresses above those listed under “Maximum

Ratings” may cause permanent damage to the device. This is

a stress rating only and functional operation of the device at

those or any other conditions above those indicated in the

operational listings of this specification is not implied.

Exposure to maximum rating conditions for extended periods

may affect device reliability.

AC/

AC/DC CHARACTERISTICS

Electrical Specifications: Unless otherwise noted, VIN = 3.0V to 5.5V, FOSC = 1 MHz with 10% Duty Cycle, CIN = 0.1 µF,

VIN for typical values = 5.0V, TA= -40°C to +125°C.

Parameters Sym Min Typ Max Units Conditions

Input Voltage

Input Operating Voltage VIN 3.0 — 5.5 V

Input Quiescent Current I(VIN)—2.84.5mAI

EXT =0mA,F

OSC IN =0Hz

Oscillator Input

External Oscillator Range FOSC —— 1MHzNote 1

Min. Oscillator High Time

Min. Oscillator Low Time TOH_MIN

TOL_MIN

—10 ns

Oscillator Rise Time TRISE 0.01 — 10 µs Note 2

Oscillator Fall Time TFALL 0.01 — 10 µs Note 2

Oscillator Input Voltage Low VL——0.8V

Oscillator Input Voltage High VH2.0 — — V

Oscillator Input Capacitance COSC 5pf

External Reference Input

Reference Voltage Input VREF 0—V

IN VNote 2, Note 3

Error Amplifier

Input Offset Voltage VOS -4 0.1 +4 mV

Error Amplifier PSRR PSRR 80 99 — dB VIN = 3.0V to 5.0V, VCM =1.2V

Common Mode Input Range VCM GND - 0.3 — VIN VNote 2, Note 3

Common Mode Rejection Ratio — 80 — dB VIN =5V,V

CM = 0V to 2.5V

Open-loop Voltage Gain AVOL 85 95 — dB RL=5kΩto VIN/2, 100 mV < VEAOUT

< VIN - 100 mV, VCM =1.2V

Low-level Output VOL — 25 GND + 50 mV RL = 5 kΩto VIN/2

Gain Bandwidth Product GBWP — 3.5 — MHz VIN =5V

Error Amplifier Sink Current ISINK 511—mAV

IN =5V,V

REF = 1.2V, VFB =1.4V,

VCOMP =2.0V

Error Amplifier Source Current ISOURCE -2 -9 — mA VIN =5V,V

REF = 1.2V, VFB =1.0V,

VCOMP = 2.0V, Absolute Value

Note 1: Capable of higher frequency operation depending on minimum and maximum duty cycles needed.

2: External oscillator input (OSC IN) rise and fall times between 10 ns and 10 µs used for characterization testing. Signal

levels between 0.8V and 2.0V with rise and fall times measured between 10% and 90% of maximum and minimum

values. Not production tested.

3: The reference input of the internal amplifier is capable of rail-to-rail operation.

MCP1630/MCP1630V

TEMPERATURE SPECIFICATIONS

Current Sense Input

Maximum Current Sense Signal

MCP1630 VCS_MAX 0.85 0.9 0.95 V Set by maximum error amplifier

clamp voltage, divided by 3.

Delay From CS to VEXT

MCP1630 TCS_VEXT —1225ns

Maximum Current Sense Signal

MCP1630V VCS_MAX 2.55 2.7 2.85 V VIN > 4.25V

Maximum CS input range limited by

comparator input common mode

range. VCS_MAX =V

IN-1.4V

Delay From CS to VEXT

MCP1630V TCS_VEXT — 17.5 35 ns

Minimum Duty Cycle DCMIN —— 0 %V

FB =V

REF +0.1V,

VCS =GND

Current Sense Input Bias Current ICS_B —-0.1— µAV

IN =5V

Internal Driver

RDSON P-channel RDSon_P —1030 Ω

RDSON N-channel RDSon_N —730Ω

VEXT Rise Time TRISE — 5.9 18 ns CL= 100 pF

Typical for VIN =3V

VEXT Fall Time TFALL — 6.2 18 ns CL= 100 pF

Typical for VIN =3V

Protection Features

Under Voltage Lockout UVLO 2.7 — 3.0 V VIN falling, VEXT low state when in

UVLO

Under Voltage Lockout Hysteresis UVLO HYS 50 75 150 mV

Thermal Shutdown TSHD — 150 — °C

Thermal Shutdown Hysteresis TSHD_HYS —18—°C

Electrical Specifications: VIN = 3.0V to 5.5V, FOSC = 1 MHz with 10% Duty Cycle, CIN = 0.1 µF. TA= -40°C to +125°C.

Parameters Sym Min Typ Max Units Conditions

Temperature Ranges

Operating Junction Temperature Range TA-40 — +125 °C Steady state

Storage Temperature Range TA-65 — +150 °C

Maximum Junction Temperature TJ— — +150 °C Transient

Thermal Package Resistances

Thermal Resistance, 8L-DFN

(2 mm x 3 mm) θJA — 50.8 — °C/W Typical 4-layer board with two

interconnecting vias

Thermal Resistance, 8L-MSOP θJA — 208 — °C/W Typical 4-layer board

AC/DC CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise noted, VIN = 3.0V to 5.5V, FOSC = 1 MHz with 10% Duty Cycle, CIN = 0.1 µF,

VIN for typical values = 5.0V, TA= -40°C to +125°C.

Parameters Sym Min Typ Max Units Conditions

Note 1: Capable of higher frequency operation depending on minimum and maximum duty cycles needed.

2: External oscillator input (OSC IN) rise and fall times between 10 ns and 10 µs used for characterization testing. Signal

levels between 0.8V and 2.0V with rise and fall times measured between 10% and 90% of maximum and minimum

values. Not production tested.

3: The reference input of the internal amplifier is capable of rail-to-rail operation.

MCP1630/MCP1630V

2.0 TYPICAL PERFORMANCE CURVES

Note: Unless otherwise noted, VIN = 3.0V to 5.5V, FOSC = 1 MHz with 10% Duty Cycle, CIN = 0.1 µF, VIN for typical

values = 5.0V, TA= -40°C to +125°C.

FIGURE 2-1: Input Quiescent Current vs.

Input Voltage.

FIGURE 2-2: Input Quiescent Current vs.

Input Voltage.

FIGURE 2-3: Error Amplifier Frequency

Response.

FIGURE 2-4: Error Amplifier Input Bias

Current vs. Input Voltage.

FIGURE 2-5: Error Amplifier Sink Current

vs. Input Voltage.

FIGURE 2-6: Error Amplifier Source

Current vs. Input Voltage.

Note: The graphs and tables provided following this note are a statistical summary based on a limited number of

samples and are provided for informational purposes only. The performance characteristics listed herein

are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified

operating range (e.g., outside specified power supply range) and therefore outside the warranted range.

0.5

1.5

2.5

3.5

3.25

3.5

3.75

4.25

4.5

4.75

5.25

5.5

Input Voltage (V)

VIN Quiescent Current (mA)

FOSC IN = DC

TA= - 40°C TA= + 25°C

TA= + 125°C

0.5

1.5

2.5

3.5

4.5

3.25

3.5

3.75

4.25

4.5

4.75

5.25

5.5

Input Voltage (V)

VIN Quiescent Current (mA)

FOSC IN = 1 MHz

TA= - 40°C TA= + 25°C

TA= + 125°C

-14

-12

-10

-8

-6

-4

-2

1000000 10000000

Frequency (Hz)

Amplifier Gain (db)

100

150

200

250

Amplifier Phase Shift

(degrees)

Gain

Phase

VREF = 2V

RLOAD = 4.7 kΩ

CLOAD = 67 pF

1M 10M5M

-100

100

200

300

400

500

600

700

3.25

3.5

3.75

4.25

4.5

4.75

5.25

5.5

Input Voltage (V)

Amplifier Input Bias Current

(pA)

VCM = VIN

= - 40°C

= + 25°C

TA= + 125°C

TA= + 85°C

3.25

3.5

3.75

4.25

4.5

4.75

5.25

5.5

Input Voltage (V)

Amplifier Sink Current (mA)

TA= - 40°C

TA= + 25°C

TA= + 125°C

-14

-12

-10

-8

-6

-4

-2

3.25

3.5

3.75

4.25

4.5

4.75

5.25

5.5

Input Voltage (V)

Amplifier Source Current (mA)

TA= - 40°C

TA= + 25°C

TA= + 125°C

MCP1630/MCP1630V

Note: Unless otherwise noted, VIN = 3.0V to 5.5V, FOSC = 1 MHz with 10% Duty Cycle, CIN = 0.1 µF, VIN for typical

values = 5.0V, TA= -40°C to +125°C.

FIGURE 2-7: VEXT Rise Time vs. Input

Voltage.

FIGURE 2-8: VEXT Fall Time vs. Input

Voltage.

FIGURE 2-9: Current Sense to VEXT

Delay vs. Input Voltage (MCP1630).

FIGURE 2-10: Current Sense Clamp

Voltage vs. Input Voltage (MCP1630).

FIGURE 2-11: Undervoltage Lockout vs.

Temperature.

FIGURE 2-12: EXT Output N-channel

RDSON vs. Input Voltage.

3.25

3.5

3.75

4.25

4.5

4.75

5.25

5.5

Input Voltage (V)

VEXT Rise Time (ns)

TA= - 40°C

TA= + 25°C

TA= + 125°C

CL= 100 pF

3.25

3.5

3.75

4.25

4.5

4.75

5.25

5.5

Input Voltage (V)

VEXT Fall Time (ns)

TA= - 40°C

TA= + 25°C

TA= + 125°C

CL= 100 pF

3.25

3.5

3.75

4.25

4.5

4.75

5.25

5.5

Input Voltage (V)

CS to VEXT delay (ns)

TA= - 40°CTA= + 25°C

TA= + 125°C

0.895

0.896

0.897

0.898

0.899

0.9

3.25

3.5

3.75

4.25

4.5

4.75

5.25

5.5

Input Voltage (V)

CS Clamp Voltage (V)

TA= - 40°C

TA= + 25°C

TA= + 125°C

2.84

2.86

2.88

2.90

2.92

2.94

2.96

-40 -25 -10 5 20 35 50 65 80 95 110 125

Ambient Temperature (°C)

UVLO Threshold (V)

Turn On Threshold

Turn Off Threshold

3.25

3.5

3.75

4.25

4.5

4.75

5.25

5.5

Input Voltage (V)

EXT Output N-Channel R

DSON

(ohms)

TA= - 40°CTA= + 25°C

TA= + 125°C

MCP1630/MCP1630V

Note: Unless otherwise noted, VIN = 3.0V to 5.5V, FOSC = 1 MHz with 10% Duty Cycle, CIN = 0.1 µF, VIN for typical

values = 5.0V, TA= -40°C to +125°C.

FIGURE 2-13: EXT Output P-channel

RDSON vs. Input Voltage.

FIGURE 2-14: Error Amplifier Input Offset

Voltage vs. Input Voltage.

FIGURE 2-15: Error Amplifier Input Offset

Voltage vs. Input Voltage.

FIGURE 2-16: Current Sense Common

Mode Input Voltage Range vs. Input Voltage

(MCP1630V).

FIGURE 2-17: Current Sense to VEXT

Delay vs. Input Voltage (MCP1630V).

3.25

3.5

3.75

4.25

4.5

4.75

5.25

5.5

Input Voltage (V)

EXT Output P-Channel R

DSON

(Ohms)

TA= - 40°C

TA= + 25°C

TA= + 125°C

-250

-200

-150

-100

-50

3.25

3.5

3.75

4.25

4.5

4.75

5.25

5.5

Input Voltage (V)

Error Amp Input Offset Voltage

(µV)

TA= - 40°C

TA= + 25°C

TA= + 125°C

VCM IN = 0V

-200

-150

-100

-50

100

150

3.25

3.5

3.75

4.25

4.5

4.75

5.25

5.5

Input Voltage (V)

Error Amp Input Offset Voltage

(µV)

TA= - 40°C

TA= + 25°C

TA= + 125°C

VCM IN = 1.2V

1.5

1.8

2.1

2.4

2.7

33.544.555.5

Input Voltage (V)

Maximum CS Input (V)

CS Common Mode

Input Range

TA= +25°C

3.25

3.5

3.75

4.25

4.5

4.75

5.25

5.5

Input Voltage (V)

CS to VEXT Delay (ns)

TA= +25°C

TA= +125°C

TA= -40°C

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