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參數(shù)資料
| 型號： | SP7683ER |
| 元件分類： | LED驅(qū)動器 |
| 英文描述： | Four Channel Charge Pump Regulator LED Driver |
| 中文描述： | 四通道電荷泵穩(wěn)壓器LED驅(qū)動器 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大小： | 137K |
| 代理商： | SP7683ER |
1
Date: 12/21/04
SP7683 Four Channel Charge Pump LED Driver Copyright 2004 Sipex Corporation
SP7683
FEATURES
■
2.7V to 5.5V Input Voltage Range
■
Up to 4 LEDS with matching currents
■
LEDs can be Driven from the Charge
Pump Output
■
1X and 1.5X Mode Charge Pump
■
High Efficiency Operation
■
1.2 MHz Switching Frequency
■
Programable LED Drive Capabliity
■
PWM Dimming Control
■
Low 0.5
μ
A Shutdown Current
■
Soft-Start Limits Inrush Current
■
Output Overvoltage Protection
■
Thermal Shutdown Protection
■
QFN (4mm x 4mm) package
Four Channel Charge Pump Regulator LED Driver
APPLICATIONS
■
Smart Phones
■
Cell Phones
■
PDA's
■
Digital Cameras
■
MP3 Players
■
Other Portables
The SP7683 is high efficiency Charge Pump which regulates up to four white LEDs with matching
current. Based on the supply headroom available for the four precision current sinks, SP7683
automatically switches between 1X and 1.5X modes. The part powers up in 1X mode, with low
quiescent current of 70uA (typ) and remains in 1X mode as long as the LED current has not
decreased by more than 0.5%. If the current decreases, then it switches into 1.5X mode where
it regulates the lowest of the LED cathode voltages to 0.1V. Other features include soft-start, over
current protection, overvoltage protection and thermal shutdown at 140
°
C. Offered in 4X4 16 pin
QFN.
TYPICAL APPLICATION SCHEMATIC
Now Available in Lead Free Packaging
Advanced
DESCRIPTION
R1
50k - 200k
GND
R3
100k
LED_EN
U1
SP7683
R5
10k
R4
270k
R9
100k
C1
1uF
C5
1uF
C4
1uF
C2
1uF
R2
1M
D1
D2
EN
Vin
D3
D4
C3
0.1uF
R10
100k
SP7683
1
12
2
7
4
6
5
3
9
8
13
10
11
14
15 16
R
SE
T
C1P
G
C
C
SP7683
14x4 mm
V
O
8
7
6
5
4
3
2
1
FB
E
C
L
L
On/Off
LED3
LED4
12
11
10
9
16
15
14
13
I
SET
V
MODE
V
IN
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP7683ER-L | 制造商:Exar Corporation 功能描述:CHARGE PUMP 4CH SMD 7683 QFN16 |
| SP7683TR | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Four Channel Charge Pump Regulator LED Driver |
| SP7685 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:1.2A Buck/Boost Charge Pump LED Driver |
| SP7685EB | 功能描述:電源管理IC開發(fā)工具 Eval Board for SP7685 Series RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| SP7685ER | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Evaluation Board Manual |
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