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BM0123A PDF даташит

Спецификация BM0123A изготовлена ​​​​«Bookly» и имеет функцию, называемую «Inherently Matched LED Current driver chip».

Детали детали

Номер произв BM0123A
Описание Inherently Matched LED Current driver chip
Производители Bookly
логотип Bookly логотип 

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BM0123A Даташит, Описание, Даташиты
BOOKLY
Features
z Inherently Matched LED Current driver chip
z High Efficiency:83%
z Drives Up to Five LEDs from 2.2V Supply
z 17V Over Voltage Protection
z Fast 1.4MHz Switching Frequency
z Requires Only 1μF Output Capacitors
z SOT-23-6 Package
BM0123A
Applications
z Communication equipment
z White LED Backlight Display for PDA
z Pocket PC
z Handheld Devices
z GPS, portable DVD, digital-frame
z White LED display backlighting
General Description
The BM0123A is a step-up DC/DC converter specifically designed to drive up to 5
series white LEDs with constant current. Series connection of the LEDs provides identical
LED currents resulting in uniform brightness and eliminates the need for ballast resistors.
The BM0123A switches at 1.4MHz, allowing the use of tiny external components. A low
0.255V feedback voltage minimizes power loss in the current setting resistor for high
efficiency. The OVP pin monitors the output voltage and turns off the converter whenever
the LEDs are open. The BM0123A is available in low profile SOT-23-6 package.
It can drive up to 5 (series) * 9 (parallel) LEDs
Pin to pin with RT9271 and AIC1896
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BM0123A Даташит, Описание, Даташиты
BOOKLY
Block Diagram
BM0123A
Pin Assignment
Typical Application Circuit
2
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BM0123A Даташит, Описание, Даташиты
BOOKLY
BM0123A
Absolute Maximum Ratings
Input Voltage ...............................................................................................................6V
OVP Voltage................................................................................................................36V
FB Voltage ................................................................................................................. 6V
SW Voltage..................................................................................................................36V
SHDN Voltage ........................................................................................................ 6V
Storage Temperature ...............................................................................-40to 125
Note: These are stress ratings only. Stresses exceeding the range specified under “Absolute Maximum
Ratingsmay cause substantial damage to the device. Functional operation of this device at other
conditions beyond those listed in the specification is not implied and prolonged exposure to extreme
conditions may affect device reliability.
Electrical Characteristics
Parameter
Symbol
Test Conditions
VEN=4.0VVIN=4.0VTa=25
Min Typ Max Unit
Input Voltage
Vin
-- 2.2 4.0 5.5 V
Feedback Voltage
V SHDN
Iout=20 mA,3LED 210 255 265 mV,
Switching Frequency
FSW
Iout=20 mA,
1.1 1.45 1.5 MHz
SHDN Voltage High
VH
--
1.3 --
-- V
SHDN Voltage Low
VL
-- -- -- 0.8 V
OVP Voltage
Vovp
--
-- 20 -- V
ICC1
Vin=3V, Ven=GND
0.005
uA
ICC2
Vin=5V, Ven=GND
0.006
uA
ICC3
Vin= Ven=3V
1 mA
ICC4
Vin= Ven=5V
1 mA
Note: Dropout voltage is defined as the input voltage minus the output voltage that produces a 2%
change in the output voltage from the value at VIN = VOUT+2V with a fixed load.
3
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Номер в каталогеОписаниеПроизводители
BM0123AInherently Matched LED Current driver chipBookly
Bookly

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