MAX1789 高级智能电池组控制器

MAX1789 高级智能电池组控制器

The MAX1789 smart battery-pack controller integrates a user-programmable microcontroller core, a coulomb-counting fuel gauge, a multichannel data-acquisition unit, and a system management bus (SMBus) v1.1-compliant master/slave SMBus interface. The 8-bit, RISC microcontroller core has an integrated 8KB of user-programmable flash and a 12KB program ROM library, which provides battery-pack designers with complete flexibility in developing fuel-gauging and control algorithms. The MAX1789 is equipped with in-system debug (ISD) capability for efficient development and debugging.

The MAX1789 includes a 12-bit data-acquisition unit to measure individual cell voltages, thermistors, current, and pack voltage. Internally adjustable overcurrent thresholds and delay timers provide a flexible solution.

The integrating fuel-gauge module provides a typical input offset of less than 1µV and gain accuracy of better than 1% with no trimming required during pack manufacture. The MAX1789 has a wide +4V to +25V operating voltage range. The MAX1789 is available as a 28-TSSOP. The MAX1789 evaluation kit is available to assist with development.

Accurate Fuel Gauge Uses V to F Method

• < 1µV Input Offset Voltage
• < 1% Gain Error
• 139nAh Resolution (5m)
• No Calibration Required

8-bit RISC Microcontroller Core

8KB of Program Flash

12KB of Program ROM

512 Bytes of Data Flash

648 Bytes of RAM

12-Bit ADC

Watchdog Timer

In-System Debug

Eliminates Separate Primary-Protection IC

• Individual Cell-Voltage Measurements with 0.5% Accuracy
• N-Channel MOSFET Gate Drivers
• Low-Current Charge Pump
• 8% Accurate Overcurrent Protection
• Programmable Overcurrent Delay Timers

3-pin, 6-LED PWM Driver

Random-Number Generator For Encryption

SMBus v1.1 Compliant with Master Capability

Typical Operating Current < 250µA

Typical Shutdown Current < 10nA

Integrated 32kHz Oscillator: No Crystal

Fully Integrated LDO (V_IN = +4V to +25V)

	数据采集系统
	笔记本电脑电池组
	专用电池组
	远端数据记录