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Introduction

Test Point Description

TP4 PMID1

TP5 SW2

TP6 SW1

TP7 CSIN

TP8 VREF

TP9 VREG

TP10 VBAT

TP11 GND - closest to VBAT

TP12 GND - closest to VIN

TP13 GND - closest to VBUS

TP14 SCL

TP15 SDA

1.5 Control and Key Parameters Setting

Jack Description Factory Setting

LED 1-2: Connect STAT pin to LED on EVM

JP1 EXT - shunt removed to allow STAT to be connected to external output using pin 2 or Shunt on LED (1-2)

pin 3

High 1-2: OTG pin high (VREF or battery voltage)

JP2 Low 2-3: OTG pin low (ground) Shunt on High (1-2)

See data sheet explanation of OTG pin functionality.

High 1-2: SLRST pin high (VREF or battery voltage) - The host can program the Safety

Limit register until the first WRITE action to any other register.

JP3 Shunt on High (1-2)

Low 2-3: SLRST pin low (ground) - All Safety Llimit values are reset to default values

regardless of WRITE actions to the Safety Limit register.

High 1-2: DIS pin high (VREF or battery voltage) - Charge disable control pin is high,

therefore charge is disabled.

JP4 Shunt on Low (2-3)

Low 2-3: DIS pin low (ground) - Charge disable control pin is low, therefore charge is

enabled.

INT 1-2: Connect LED pin to LED on EVM

JP5 EXT - shunt removed to allow LED to be connected to external output using pin 2 or Shunt on INT (1-2)

pin 3

1.6 Recommended Operating Conditions

Min Typ Max Unit

Supply voltage, VIN Input voltage from ac adapter input 4 5 9 V

USB voltage, VBUS Input voltage from USB input 4 5 6 V

Battery voltage, V

BAT

Regulated voltage at VBAT terminals/headers 3.5 4.44 V

Supply current, I

Maximum input current from ac adapter input 1.8 A

Supply current, I

VBUS

Maximum input current from USB input 1.7 A

Fast-charge current, I

chrg

Battery fast-charge current 0.55 1.55 A

Operating junction temperature range, T

0 125 °C

SLUU495A–October 2011–Revised September 2012 bq24140, Fully Integrated, Dual-Input, Switch-Mode, One-Cell, Li-Ion Charger

With Full USB Compliance and USB-OTG Support EVM

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