LTC4007-1 4A, High Efficiency, Li-Ion Battery Charger

The LTC®4007-1 is a constant-current/constant-voltage charger controller for 3- or 4-cell lithium-ion batteries. The PWM controller uses a synchronous, quasi-constant frequency, constant off-time architecture that will not generate audible noise even when using ceramic capacitors. Charging current is programmable to ±4% accuracy using a programming resistor. Charging current can also be monitored as a voltage across the programming resistor.

The output float voltage is pin programmed for cell count (3 cells or 4 cells) and chemistry (4.2V/4.1V). A timer, programmed by an external resistor, sets the total charge time.

The LTC4007-1 includes a thermistor input, which suspends charging if an unsafe temperature condition is detected. If the cell voltage is less than 3.25V, a low-battery indicator asserts and can be used to program a trickle charge current to safely charge depleted batteries. The FAULT pin is also asserted and charging terminates if the low-battery condition persists for more than 1/4 of the total charge time

产品特点 Features

Charger Controller for 3- or 4-Cell Lithium-Ion Batteries
High Conversion Efficiency: Up to 96%
Output Currents Exceeding 4A
±0.8% Charging Voltage Accuracy
Built-In Charge Termination for Li-Ion Batteries
AC Adapter Current Limiting Maximizes Charge Rate*
Thermistor Input for Temperature Qualified Charging
Wide Input Voltage Range: 6V to 28V
0.5V Dropout Voltage; Maximum Duty Cycle: 98%
Programmable Charge Current: ±4% Accuracy
Indicator Outputs for Charging, C/10 Current Detection, AC Adapter Present, Low Battery, Input Current Limiting and Faults
Charging Current Monitor Output
Available in a 24-Pin 4mm × 5mm QFN Package

应用

Notebook Computers
Portable Instruments
Battery-Backup Systems
Li-Ion Chargers

典型应用图

参数

LTC4007-1 订购信息和价格参考Package Variations and Pricing

器件型号	封装	引脚	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量) *
LTC4007EGN	SSOP	24	E	$5.45	$3.80
LTC4007EGN#PBF	SSOP	24	E	$5.45	$3.80
LTC4007EGN#TR	SSOP	24	E		$3.90
LTC4007EGN#TRPBF	SSOP	24	E		$3.90
LTC4007EUFD-1	QFN	24	E	$5.43	$3.80
LTC4007EUFD-1#PBF	QFN	24	E	$5.43	$3.80
LTC4007EUFD-1#TR	QFN	24	E		$3.90
LTC4007EUFD-1#TRPBF	QFN	24	E		$3.90

LTC4007-1 数据手册及相关资料下载

数据手册(英文) : LTC4007-1 - 4A, High Efficiency, Li-Ion Battery Charger.PDF
可靠性数据 : R480 Reliability Data .PDF
产品选型卡 : I2C Battery Gas Gauges.PDF