您的位置：维库电子市场网 > Datasheet > TPS61042

TPS61042 Datasheet

  • TPS61042

  • 采用 QFN-8 封装的 30V 500mA 开关升压转换器，用于白光 LED 应...

  • 792.00KB

  • 25页

  • TI

阅览下载 纠错 0

扫码查看芯片数据手册

上传产品规格书

PDF预览

www.ti.com
TPS61042
SLVS441B 鈥?DECEMBER 2002 鈥?REVISED JANUARY 2003
CONSTANT CURRENT LED DRIVER
FEATURES
DESCRIPTION
The TPS61042 is a high frequency boost converter with
constant current output that drives white LEDs or similar.
The LED current is set with the external sense resistor
(R
S
) and is directly regulated by the feedback pin (FB)
that regulates the voltage across the sense resistor R
S
to
252 mV (typ). To control LED brightness, the LED
current can be pulsed by applying a PWM (pulse width
modulated) signal with a frequency range of 100 Hz to 50
kHz to the control pin (CTRL). To allow higher flexibility,
the device can be configured where the brightness can
be controlled by an analog signal as well, as described in
the
application information
section. To avoid possible
leakage currents through the LEDs during shutdown, the
control pin (CTRL) disables the device and disconnects
the LEDs from ground. For maximum safety during
operation, the output has integrated overvoltage
protection that prevents damage to the device in case of
a high impedance output (e.g. faulty LED).
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Current Source With Overvoltage Protection
Input Voltage Range . . 1.8 V to 6.0 V
Internal 30 V Switch
Up to 85% Efficiency
Precise Brightness Control Using PWM Signal
or Analog Signal
Switching Frequency . . Up to 1 MHz
Internal Power MOSFET Switch . . 500 mA
Operates With Small Output Capacitors Down
to 100 nF
Disconnects LEDs During Shutdown
No Load Quiescent Current . . 38 碌A Typ
Shutdown Current . . 0.1 碌A Typ
Available in a Small 3 mm
脳
3 mm QFN
Package
APPLICATIONS
White LED Supply for Backlight/Sidelight
Displays
鈥?PDA, Pocket PC, Smart Phones
鈥?Handheld Devices
鈥?Cellular Phones
L1
4.7
mH
D1
V
in
1.8 V to 6 V
3
VIN
SW
8
C
O鈥?/div>
100 nF
C
in
4.7
mF
5
CTRL OVP
7
6
GND
LED
1
4
FB
R
S
2
Enable/PWM Brightness Control
100 Hz to 50 kHz
R
s
13
W
鈥?Larger output capacitor values like 1 碌F and larger, reduce the LED ripple current and improve line regulation.
Figure 1. Typical Application
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments
semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Copyright 漏 2003, Texas Instruments Incorporated

TPS61042相关型号PDF文件下载

您可能感兴趣的PDF文件资料

热门IC型号推荐

©2025 维库电子市场网（www.dzsc.com）　备案号：浙B2-20050339-1 经营许可证：浙B2-20210386版权声明
买家服务热线：0571-85317607 | 买家服务部QQ： QQ:1609526468
卖家服务热线：0571-85317607 | 卖家服务部QQ： QQ:331652727

扫码下载APP，
一键连接广大的电子世界。

在线人工客服

买家服务：
卖家服务：
技术客服：

0571-85317607

网站技术支持

13606545031

客服在线时间周一至周五
9:00-17:30

关注官方微信号，
第一时间获取资讯。

建议反馈
返回顶部

建议反馈

联系人：

联系方式：

按住滑块，拖拽到最右边
>>
感谢您向阿库提出的宝贵意见，您的参与是维库提升服务的动力！意见一经采纳，将有感恩红包奉上哦！

PDF纠错X

投诉电话：0571-85317607 投诉QQ：

如选匿名将无法为您反馈投诉结果，建议实名投诉！