Analog Devices Inc. AD8452 PWM Controllers
Analog Devices AD8452 PWM Controllers combine a precision analog front-end controller and switch mode power supply (SMPS), pulse-width modulator (PWM) driver into a single silicon platform for high volume battery testing and formation manufacturing. A precision instrumentation amplifier (in-amp) measures the battery charge / discharge current to better than ±0.1% accuracy, while an equally accurate difference amplifier measures the battery voltage. Internal laser trimmed resistor networks establish the in-amp and difference amplifier gains (66 V/V and 0.4 V/V, respectively), and stabilize the AD8452 performance across the rated operating temperature range.
Features
- CC and CV battery test and formation modes with transparent and automatic switchover, for systems of 20Ah or less
- Precise measurement of voltage and current
- Independent feedback control blocks
- Highly accurate, factory trimmed instrumentation and differential amplifiers
- Stable over temperature: offset voltage drift <0.6μV/°C (maximum)
- Gain drift: <3ppm/°C (maximum)
- In-amp for current sense gain: 66V/V
- Difference amplifier for voltage sense gain: 0.4V/V
- Current sense CMRR: 120dB minimum
- Popular SMPS control for charge/discharge
- High PWM linearity with internal ramp voltage
- 50kHz to 300kHz user controlled switching frequency
- Synchronization output or input with adjustable phase shift
- Programmable soft start
Development Tool
Learn More About
Analog Devices Inc. Lithium Ion Battery Formation & Test Solutions
Small, environmental friendly system for testing and formation rechargeable battery cells & packs.
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