The CXUS65171 is a charge pump for high-current white LED driving used in camera flash applications. The architecture of two bucket capacitors is used to decrease the output ripple and provides low EMI solution compared to inductive DC-DC regulators. The CXUS65171 has independent flash/torch/shutdown modes. The CXUS65171 is capable to output 500mA of regulated current in flash mode for the duration greater than 500ms. While driving 700mA output current, the reduced duration is limit by CXUS65171’s over-temperature protection. There is a one second safety timer in this mode to avoid LED damage caused by overheat. The CXUS65171 can outputs 20% of flash mode current continuously in torch mode. The flash mode has priority over the torch mode. A resistor connected to ISET pin, which is in series with the LED, is to set the current. The ISET voltage is 250mV and 50mV in flash and torch mode respectively
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产品概述 返回TOP
The CXUS65171 is a charge pump for high-current white LED driving used in camera flash applications. The architecture of two bucket capacitors is used to decrease the output ripple and provides low EMI solution compared to inductive DC-DC regulators. The CXUS65171 has independent flash/torch/shutdown modes. The CXUS65171 is capable to output 500mA of regulated current in flash mode for the duration greater than 500ms. While driving 700mA output current, the reduced duration is limit by CXUS65171’s over-temperature protection. There is a one second safety timer in this mode to avoid LED damage caused by overheat. The CXUS65171 can outputs 20% of flash mode current continuously in torch mode. The flash mode has priority over the torch mode. A resistor connected to ISET pin, which is in series with the LED, is to set the current. The ISET voltage is 250mV and 50mV in flash and torch mode respectively. The GCXUS65171is available in tiny 10-pin 3x3mm TDFN package.
产品特点 返回TOP
„ Independent flash/torch/shutdown modes
„ Up to 700mA drive current
„ Flash timeout protection
„ Torch mode set to 20% of flash current
„ 1X/2X mode for torch mode to maximize efficiency
„ Wide input voltage range from 3V to 5.5V
„<1μA shutdown current
„ Input/Output over-voltage protection
„ Short-circuit protection
„ Over-temperature protection
„ Tiny TDFN3X3-10 package
应用范围 返回TOP
„ Cellular camera phone
„ Digital still camera
„ PDA camera
„ Camcorder torch lamp
技术规格书（产品PDF) 返回TOP
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产品封装图 返回TOP
电路原理图 返回TOP
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Charge Pump and Current Source |
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|
Part NO. |
Vin(V) min. |
Vin(V) max. |
IOUT (mA) |
FOSC (kHz) |
VOUT (V) |
LED Number |
Eff. (%) |
Note |
Package |
|
3 |
5.5 |
600 |
250 |
1x/2x |
1 |
-- |
Flash LEDdriver,Flash/Torch/SHDN |
TDFN3X3-10 |
|
|
2.7 |
5.5 |
80 |
250 |
1x/2x |
4 |
90 |
4-CH LED in Parallel,PWM control16 levels dimming control |
TDFN2.5X2.5-10 TQFN3X3-16 |
|
|
2.7 |
5 |
90 |
1000 |
4.5/5 |
-- |
88 |
EN,GND,VOUT,C+,VIN,C-,Boost |
TSOT-23-6/TDFN2X2-6 |
|
|
1.8 |
5 |
60 |
270 |
-VIN |
-- |
90 |
IN,EN,GND,C-,C+,OUT,Inverting |
SOT-23-6/TDFN2X2-6 |
|
|
1.8 |
5 |
60 |
270 |
-VIN |
-- |
90 |
NC,CP+,GND,CP-,OUT,NC,NC,IN |
SOP-8 |
|
|
8 |
24 |
10 |
350 |
1.5x |
-- |
-- |
PG,D_CAP |
MSOP-8 |
|
|
8 |
24 |
10 |
370 |
1.5x |
-- |
-- |
PG,D_CAP,12V,ONx,DRIVERx |
TQFN3X3-20 |
|
|
4.5 |
5.5 |
14 |
-- |
2x |
-- |
-- |
2-NMOSFET driver,20mA discharging |
TQFN3X3-20 |
|
