LV52205MU 查看數據表（PDF） - ON Semiconductor

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LV52205MU

LED Boost Driver with PWM Dimming

ON Semiconductor 

PWM Control

Ton>20us

PWM

Shutdown

DC-DC Delay

max = 4.6ms

DCDCENH

(IC inside signal)

FB

LV52205MU

Toff > 8.9ms

PWM Enable

Max 4ms @ Cfcap = 22nF

(T.C.= 60k * Cfcap)

FCAP

The time until stable movement max = 8.6ms

Fig2.Timing Diagram in PWM signal

Open LED Protection

If SW terminal voltage exceeds a threshold Vovp (41V typ) for 8 cycles, boost converter enters shutdown mode. In

order to restart the IC, PWM setup signal is required again.

Over Current Protection

Current limit value for built-in power MOS is around 0.7A. The power MOS is turned off for each switching cycle when

peak current through it exceeds the limit value.

Under Voltage Lock Out (UVLO)

UVLO operation works when VIN terminal voltage is below 2.2V.

Thermal Shutdown

When chip temperature is too high, boost converter is stopped.

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