Summary
Emergency double head lamp / sign lamp application control chip, built-in battery detection, control, protection and light source constant current drive, short circuit
Open circuit detection module circuit.
Characteristics
 voltage operating range 2.4-5.5v.
Typical standby working current, no load < 1.2mA @ VDD = 5.0V; IDD off < 3.5ua @ VDD = 1.2V.
 provide Ni Cd / Ni MH single battery applications to save battery costs.
It has battery charging / discharging protection function, battery charging full cut-off function and battery discharging protection detection function.
(charging current can be adjusted by external series resistance)
The maximum charging time of the battery is 20 / 12 hours, which provides automatic recharge function after discharge.
 light source detection short / open circuit function. (double end two string / Peugeot lamp two-way detection)
 built in boost 128khz (k = 1024) led light source with constant current output to increase battery working time.
Provide buzzer output (three output modes are selected for the foot position).
Three LED outputs indicate the main electrical function / charging function / fault function.
Monthly auto / annual auto / button is provided to enter into the test mode (the foot position of the monthly auto detection function selects "on / off").
Fast monthly and annual automatic detection function (automatic access to emergency detection light source / battery discharge capacity)
IC matrix
Package type: SOP16