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3. TECHNICAL BRIEF
1 1 Battery Charging block
i. It can be used to charge Lithium Ion batteries. Charger initialization, trickle charging, and Li-Ion
charging control are implemented in hardware.
ii. Charging Process
- Check charger is inserted or not
- Exception: When battery voltage is lower than 3.2V, the precharge(low current charge mode)
starts firstly.
- And the battery voltage reach to 3.2V the CC-CV charging starts.
iii. Pins used for charging
- VCHG : charger supply
- GATEDRIVE : charge DAC output
- ISENSE : charge current sense input
- VBATSENSE : battery voltage
- BATTYPE : battery type identification input
- REFCHG : voltage reference output
- TEMP1 : temp sensor1 channel 1 input/output
iv. TA (Travel Adaptor)
- Input voltage: AC 85V ~ 260V, 50~60Hz
- Output voltage: DC 5.2V ( ±0.2 V )
- Output current: Max 800mA ( ±50mA )
v. Battery
- Li-ion battery (Max 4.2V, Nom 3.7V)
- Standard battery: Capacity - 1000mA
Figure 12 : AD6537B BATTERY CHARGING BLOCK
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