TC3827 datasheet(2/10 Pages) MICROCHIP

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Lithium-Ion Battery Charger

TC3827

TC3827-2 12/12/00

DS21558A

ABSOLUTE MAXIMUM RATINGS*

Input Voltage (VIN), VOUT, VSNS, MODE, and IMON ...........

.............................................................. –0.3V to 6.0V

SHDN ...............................................–0.3V to (VIN + 0.3V)

8-Pin MSOP (derate 4.1mW/

°C above +70°C) .....330mW

Operating Ambient Temperature Range .. –20

°C to +85°C

Storage Temperature Range ................. –65

°C to +150°C

Lead Temperature (Soldering, 10 sec) ................. +300

°C

Vapor Phase (60 sec) ........................................... +210

°C

Infrared (15 sec) .................................................... +220

°C

IIMON (source) ......................................................0.375mA

ELECTRICAL CHARACTERISTICS: VIN= [VREG + 1V] , TA = -20°C to +85°C, unless otherwise noted. Typical values

at TA = +25°C, RSENSE = 500mΩ, Test Circuit Figure 3.

Symbol

Parameter

Test Conditions

Min

Typ

Max

Units

IVIN

Power Supply Current

Shutdown Mode, VSHDN = 0V

—

µA

Constant Voltage Mode

—

350

560

VIN

Power Supply Voltage In

4.5

—

5.5

Voltage Regulation (Constant Voltage Mode)

VREG

Battery Regulation Volts

3827- 4.2VUA

—

4.2

—

3827- 4.1VUA

—

4.1

—

VOUT

Output Voltage Accuracy

VIN = VREG + 1V to 5.5V,

–1

—

LIREG

Line Regulation

VIN = 4.5V to 5.5V, IOUT = 75mA

–10

—

+10

LDREG

Load Regulation

IOUT =10mA to 75mA

–1

±0.2

IDISCH

Output Reverse Leakage

VIN = Floating, VOUT = VREG

—1

µA

MOSFET Gate Drive

IDRV

Gate Drive Current

Sink, Constant Voltage Mode (Note 1)

—

Source, Constant Voltage Mode (Note 1)

0.08

—

VDRV

Gate Drive Min Voltage

—

1.0

—

Current Sense Amp

VGAIN

GAIN (

∆VGS/∆VOUT)

—

100

—

VCS

Current Limit Threshold

(VIN – VSNS) @ IMAX

ISC

Short Circuit Current

—

KFactor

—

0.46

—

A/A

MODE

VTH

Mode Threshold

—

VREG

—V

VOL

Mode Low Voltage

ISINK = 10mA, VOUT = 3.5V

—

400

ILK

Mode Leakage Current

VMODE = 5.5V, IO = 0mA,

—

µA

MODE = Constant Voltage

SHDN

VIH

SHDN High Threshold

—

%VDD

VIL

SHDN Low Threshold

–

—

%VDD

ILK

SHDN Leakage Current

VSHDN = 0V to 5V

—

µA

IMON

∆VIMON

Current Sense Gain

VO = 0V to 3.5V,RL > 20kΩ

—

V/V

∆(VIN - VSNS)

IMODE (sink) .............................................................. 20mA

IDRV ............................................................................1mA

ESD Rating ................................................................. 2kV

*Static-sensitive device. Unused devices must be stored in conductive

material. Protect devices from static discharge and static fields. Stresses

above those listed under Absolute Maximum Ratings may cause perma-

nent damage to the device. These are stress ratings only and functional

operation of the device at these or any other conditions above those

indicated in the operational sections of the specifications is not implied.

Exposure to Absolute Maximum Rating Conditions for extended periods

may affect device reliability.

Notes: 1. Where VOUT = 1% from Nominal, continuous current.

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