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SGM3123のメーカーはShengbang Microelectronicsです、この部品の機能は「White LED Driver」です。 |
部品番号 | SGM3123 |
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部品説明 | White LED Driver | ||
メーカ | Shengbang Microelectronics | ||
ロゴ | |||
このページの下部にプレビューとSGM3123ダウンロード(pdfファイル)リンクがあります。 Total 10 pages
GENERAL DESCRIPTION
The SGM3123 low-dropout bias supply for white LEDs
is a high-performance alternative to the simple ballast
resistors used in conventional white LED designs. It is
optimized for low power keypad and portable
backlighting applications.
The SGM3123 uses an internal resistor to set the bias
current for four LEDs, which are matched to ±5%. The
SGM3123's advantages over ballast resistors include
much lower bias variation with supply voltage variation,
significantly lower dropout voltage, and in some
applications, significantly improved efficiency.
The SGM3123 requires only a 40mV dropout voltage at
a 20mA load on each output to match the LED
brightness.
The SGM3123 is available in Green TQFN-3×3-16L
package. It operates over an ambient temperature range
of -40℃ to +85℃.
SGM3123
White LED Driver with
Low Dropout Current Source
FEATURES
● Support up to 4 LEDs
● Low 40mV Dropout at 20mA
● Less than ±5% LED Current Matching
● Simple LED Brightness Control
● Low Shutdown Current
● 2.5V to 5.0V Supply Voltage Range
● Thermal Shutdown Protection
● Operating Temperature Range: -40℃ to +85℃
● Available in Green TQFN-3×3-16L Package
APPLICATIONS
Wireless Handsets
MP3, MP4, and PMP
Cellular Phones
Portable Communication Devices
Digital Cameras, Camcorders
PDAs, Palmtops, and Handy Terminals
LED/Display Back Light Driver
LEDs for Camera Flash
Battery-Powered Equipment
SG Micro Corp
www.sg-micro.com
REV. A. 2
1 Page SGM3123
PIN CONFIGURATION (TOP VIEW)
White LED Driver with
Low Dropout Current Source
NC NC NC NC
12 11 10
VIN 13
9
8 VOUT
GND 14
EN 15
GND
7 PGND
6 LED1
EN 16
5 LED2
1 234
NC NC LED4 LED3
TQFN-3×3-16L
PIN DESCRIPTION
PIN
1, 2, 9, 10,
11, 12
3, 4, 5, 6
7
8
13
14
15, 16
Exposed
Pad
NAME
FUNCTION
NC No Internal Connection.
LED1-LED4
PGND
VOUT
VIN
GND
EN
LED1-LED4 Output Pin. Connect to LED1-LED4’s cathode. 20mA constant current
output. They are high impedance when EN is low.
Power Ground.
Output Voltage Source for LED1 to LED4.
Supply Voltage Input.
Analog Ground.
Enable Input (Active High).
GND
Exposed pad should be soldered to PCB board and connected to GND.
SG Micro Corp
www.sg-micro.com
3
3Pages SGM3123
White LED Driver with
Low Dropout Current Source
TYPICAL PERFORMANCE CHARACTERISTICS
Line Transient Response
VIN = 3.2V to 3.7V
VIN
ILED
1V
/div
25mA
0mA
Time (100µs/div)
SG Micro Corp
www.sg-micro.com
6
6 Page | |||
ページ | 合計 : 10 ページ | ||
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PDF ダウンロード | [ SGM3123 データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
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