Product Description
With ASIC design, it prevents the halt that happens in the current MCU design, and also avoids not being able to reset when the IC is under threshold voltage. The IC works stably, and also provides protection when heating coil is short, the IC can turn off when load resistance is below 1ohm; At power-down mode the IC achieves a quiescent current under 3uA. The output current exceeds 1A during smoking; At the same time, the S085 offers visual LED working mode instructions, which shows different LED indication when the IC is working under different modes¬ Including start up, smoking, voltage detection, short circuit protection, charging. The IC achieves excellent charging performance, S085 provides complete battery protection; Build in charging control circuit, support AC adapter, USB and other charging devices. The IC is trickle charge mode when lithium battery voltage is under 2.7V which protects the battery. When battery voltage exceeds 2.7V, it turns into large charge current mode, then the charging current starts to drop when the battery voltage approaches 4.2V. The detection error is kept within 1%.
The S085 integrates a regulator to reduce the loss. The IC is available in SOT 23-5 package. The small volume and the use of the least passive components (a LED and a capacitor) achieve the overall solution cost.

Features
ASIC Design
Low quiescent current(< 3uA)at power-down mode
Build in short circuit protection (SCP)
Build in under voltage protection (UVLO)
Build in over temperature protection (OTP)
LED working mode instruction
Wide voltage charging(4.5-6V), excellent and safe charging performance
High voltage detection accuracy (within1%)
Complete battery protection
Trickle charge when battery voltage < 2.7V.; Large current charge when battery voltage between 2.7V and 4.2V; Constant voltage charge when battery voltage approaches 4.2V
The least passive components needed, lower cost.

The mean features of those modules are as follows:

Low quiescent current (< 3uA)
The IC can work under three modes in the system: Charging mode, operation mode, and power-down mode. The IC enters power-down mode after the power-on, and the IC would stay in that mode when not smoking. It is only when smoking the IC enters operation mode. The low quiescent current of power-down mode reduces power loss, and also extends the usage time of the charged battery.
Excellent and safe charging
The internal charging module provides a wide charging voltage: Both AC adapter and USB can be used to charge the IC, 5V(4.5V~6V)is recommended, The IC enters automatic protection when the IC charge up to 4.2V;
During charging, the IC trickle charges when lithium battery charging voltage is under 2.7V which protects the battery. When charging voltage exceeds 2.7V, it turns into large current charge, then the charging current starts to drop when the charging voltage approaches 4.2V. The detection error is kept within 1%. The LED lights up during charging and off when fully charged (VDD> 4.1V)

Oscillator (OSC)
The IC is inherited with a 33 kHz oscillating frequency clock control signal to provide for the internal circuit, in order to make sure the IC operates and indicates right.

Protection module
The S085 contains under voltage protection(UVLO)to detect the supply voltage, when operating voltage is lower than 3.1V, the IC enters UVLO protection; The short circuit protection(SCP)indicates when load resistance is below 1ohm; Over temperature protection is introduced to control the operating temperature and save the IC usage time

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