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Description
The SM8133B00B is a charge pump type white LED driver suitable for driving 1 to 6 backlight white LED connected in parallel and 1 flash white LED. It is designed with a 3.0V LDO (Low Dropout Regulator), making it ideal for camera-equipped cellular phones. The charge pump switches between ×1 to ×1.5 boost mode based on the LED drive current requirements, thus maximizing battery life. The device supports variations in LED forward-bias voltage drop (VF) by responding to the drive current of all the connected LED. It features a 7-channel LED drive current control circuit to control the drive current of each LED, with the 6 backlight channels divided into 2 groups for independent dimming and lighting control. The backlight grouping, backlight LED drive current and ON/OFF control, flash LED drive current and ON/OFF control, and LDO output ON/OFF control can all be set using a 3-wire serial interface data input. Additionally, the RESETB pin can be connected to the microcontroller supply for a system-wide shutdown function.
Specifications and features
- Noise reduction due to charge pump boost circuit
- Automatic charge pump switching to conserve power
- Drives 1 to 6 backlight white LED (30mA/ch at maximum setting)
- Drives a flash white LED (150mA at maximum setting)
- Backlight and flash white LED brightness adjustment
- Group settings for 2-group backlight lighting control
- 3-wire serial input interface for all setting and control
- 3.0V output LDO circuit built-in
- Shutdown function by RESETB pin
- Soft start circuit built-in
- Thermal protection circuit built-in
- Input voltage range:
- No-load current (IOUT= 0mA): 2.7 to 4.6V
- Load current (IOUT= 80mA): 3.0 to 4.6V
- Load current (IOUT= 200mA): 3.3 to 4.6V
- Quiescent current:
- LDO only: 0.3mA (typ)
- Not-switching (×1.0 mode): 0.5mA (typ)
- Switching (×1.5 mode): 2.5mA (typ)
- Standby current: 0.01µA (typ)
- Operating frequency: 750kHz (typ)
- Backlight LED current: 30mA/ch (typ)
- Flash LED current: 150mA (typ)
- All LED total maximum current: 200mA (typ)
- Backlight LED current matching (ILED= 30mA): ±3%
- Flash LED current accuracy (ILED= 150mA): ±5%
- LDO (Low Dropout Regulator) output voltage: 3.0V±2%
- Packages: 20-pin QFN WL-CSP (under development)
Application Scenarios
The SM8133B00B is commonly used in the following applications:
- Cellular phones
- Digital still cameras
- PDA
- Portable games
Comparison
Advantages- Supports driving 1 to 6 parallel backlight white LED and 1 flash white LED
- Extends battery life by switching between ×1 to ×1.5 boost mode based on LED drive current requirements
- Allows independent dimming and lighting control for the 6 backlight channels divided into 2 groups
- 3-wire serial interface data input for easy setting and control
- Built-in 3.0V LDO (Low Dropout Regulator)
- Shutdown function by RESETB pin for system-wide shutdown
- Includes soft start circuit and thermal protection circuit
Disadvantages- Package is currently under development
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Datasheet
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Shopping guide
Delivery period:
- - Will ship out in 2-3 days
- - DHL Express: 3-7 business days
- - DHL eCommerce: 12-22 business days
- - FedEx International Priority: 3-7 business days
- - EMS: 10-15 business days
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Popular parts of the same kind
- Datasheet: Download SM8133B00B
- Chipdatas Part: CD92-SM8133B00B
- Warehouse: China, Hong Kong
- Dispatch: Within 24 hours
- Free Shipping: Yes
- Prority Shipping: Yes, 3-5 days
- Last Updated: 2024/09/28 19:18 +0800
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- Full Refund if you don't receive your order
- Full or Partial Refund , If the item is not as described
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The fee is charged according to the rule of PayPal.
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Western Union charge US$0.00 banking fee.
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