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参数资料
| 型号： | MAX1579 |
| 厂商： | Maxim Integrated Products, Inc. |
| 英文描述： | Complete Bias and White LED Power Supplies for Small TFT Displays |
| 中文描述： | 可提供完备偏置的白光LED电源，用于TFT显示器 |
| 文件页数： | 7/13页 |
| 文件大小： | 221K |
| 代理商： | MAX1579 |
M
Complete Bias and White LED Power S upplies
for S mall T FT Displays
_______________________________________________________________________________________
7
PIN
NAME
FUNCTION
11
ONBIAS
Logic Input to Enable V
DD
, MAIN, POS, and NEG Charge Pumps. Drive ONBIAS high to enable all the
charge pumps. Connect to GND to disable the charge pumps.
12
GND
Ground. Connect to PGND and the exposed pad directly under the IC.
13
COMP
LED Driver Compensation. Connect a 0.1μF from COMP to GND. C
COMP
stabilizes the driver and
sets the soft-start time.
14
CS
Current-Sense Feedback Input. Connect a resistor from CS to GND to set the LED current. For the
MAX1578, CS regulates to V
CTRL
/ 5 or 0.327V, whichever is lower. For the MAX1579, CS regulates to
V
CTRL
/ 5 or 0.340V, whichever is lower.
15
CTRL
LE D Br g htness C ontr ol Inp ut. C onnect C TRL to a 0.24V to 1.65V i np ut to set the b r g htness of the
exter nal LE D s. H ol d C TRL b el ow 100m V for m or e than 10.5m s, to shut d ow n the LE D d r ver D r ve C TRL
w h a 200H z to 200kH z unfi er ed P W M d m m ng si g nal for D C LE D cur r ent that i s p op or i onal to the
si g nal s d uty cycl e.
16
OUT
Over vol ag e S ense Inp ut. The M AX 1578/M AX 1579 tur n off the n- channel M OS FE T w hen V
OU T
exceed s 34V
Once V
OU T
d op s b el ow 32V the IC r e- enter s soft- star . Byp ass OU T to GN D w h a 0.1μF cap aci or
17
LX
Inductor Connection. Connect to the switched side of the external inductor as well as the anode of the
external diode. LX is high impedance during shutdown.
18
PGND
Power Ground. Connect to GND and the exposed pad directly under the IC.
19
C1N
Main Charge-Pump Transfer Capacitor Negative Connection 1. Connect a 2.2μF capacitor between
C1N and C1P.
20
C2N
Main Charge-Pump Transfer Capacitor Negative Connection 2. Connect a 2.2μF capacitor between
C2N and C2P.
21
IN
P ow er S up p y Inp ut. C onnect to a 2.7V to 5.5V i np ut sup p y. Byp ass IN to GN D w h a 4.7μF cap aci or
22
C2P
Main Charge-Pump Transfer Capacitor Positive Connection 2. Connect a 2.2μF capacitor between
C2P and C2N.
23
C1P
Main Charge-Pump Transfer Capacitor Positive Connection 1. Connect a 2.2μF capacitor between
C1P and C1N.
24
V
DD
Regulated Main Charge-Pump Output. V
DD
is regulated to 5.5V. Bypass V
DD
to GND with a 4.7μF
capacitor. V
DD
is connected to IN when ONBIAS is pulled low.
Exposed Paddle. Connect directly to a ground plane, GND, and PGND directly under the IC.
—
EP
Pin Desc ription (c ontinued)
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| MAX1579ETG | 功能描述:LED照明驱动器 RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| MAX1579ETG+ | 功能描述:LED照明驱动器 Cmplete Bias & White LED Power Supply RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| MAX1579ETG+T | 功能描述:LED照明驱动器 Cmplete Bias & White LED Power Supply RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| MAX1579ETG-T | 功能描述:LED照明驱动器 RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| MAX1579EVKIT | 功能描述:LED 照明开发工具 Evaluation Kit for the MAX1579 RoHS:否 制造商:Fairchild Semiconductor 产品:Evaluation Kits 用于:FL7732 核心: 电源电压:120V 系列: 封装: |
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