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AP2152 Datasheet(PDF) 12 Page - Asahi Kasei Microsystems

Part # AP2152
Description  3CH High Power WLED Driver
PDF  18 Pages
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Manufacturer  AKM [Asahi Kasei Microsystems]
Direct Link  http://www.akm.com
Logo AKM - Asahi Kasei Microsystems

AP2152 Datasheet(HTML) 12 Page - Asahi Kasei Microsystems

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［AP2152］
MS1348-E-00
12
2012/05
Internal Nch FET on PGOOD pin operation
●Turn off during normal operation
●Turn on when abnormal operation
Timer latch off (Over current, CH short, Thermal protection), all CH are open or short, UVLO
●Turn on when in standby state while supply voltage (VIN) is applied. Turn off when VIN is less than 2V
●Turn on without delay by timer circuit when OVP pin short is detected.
Figure6.
PGOOD pin operation
Figure7.
Cut off VIN-LED anode path by using an external FET (example)
VPWM
VIN
VIN
PWM
Initial determination
1/10 *ILED
ILED
LED setting current
30ms typ
1ms
LED Current
Soft Start
PGOOD
PGOOD
PGOOD
PGOOD
ON
OFF
OFF
ON
About 2V
OFF
About2V
0.3ms typ
VIN
8
LX
15
PGOOD
C IN2
C OUT 2
L
D
C OUT1
C IN1
VIN
1
LED Anode
3. 3V



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