LED大功率升降压恒流驱动芯片外围超简单可PWM模拟调光高效率驱动方案

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LED大功率升降压恒流驱动芯片外围超简单可PWM模拟调光高效率驱动方案
. f, C" _$ D  @5 ?- a5 V# _ AP5503 宽电压 LED 升降压型恒流芯片
/ I# M4 c9 P$ z
描述
AP5503是电流模式DC / DC转换器，具有
: E  z" |' M5 h% \5 z3 F2 T0 t用于驱动LED的外部电源NMOS。的
7 T( y' G3 ~  s1 H2 @AP5503在降压，升压和升压模式下用作LED驱动器
# s% R/ t, n8 @9 j( P' b: Y降压-升压模式。 LED电流可通过120mV感测电阻器在外部编程。用
6 W7 @& G$ P1 k500KHz工作频率，外部电感和
" n1 l% C1 O3 `: T' T7 ~输入/输出电容器都可以很小。调光罐
% c0 D" \3 w8 N% b1 n" }. W0 X可以是模拟，PWM或PWM转换为模拟
- E* X+ I5 P' ^+ ]1 Q# W与外部电容器。
5 l1 C% d! E* Y; V, L$ wAP5503采用MSOP-10（FD）封装。
特征
( @7 Z( g; {6 k$ x7 w„高电压：VIN最高60V，VOUT最高60V
降压，升压或降压-升压操作
„具有500KHz和200KHz的电流模式PWM
开关频率
* \. H7 W# w& u% T- I„易于调光：使用一个外部电容器将模拟，PWM或PWM转换为模拟
软启动以避免涌入电流
# r3 q4 k; c5 ^7 b- Y4 p% b% `- e可编程过压保护至极限
# h  W# `8 M7 Y* ~+ h2 }" x输出电压
. D" Y- z/ l- G& S" C# s/ n! N6 a' ^VIN欠压锁定和热关断
- r" g: v' e. ]! @5 y, B1 Z6 cMSOP-10（FD）封装
! }4 Z" j1 ^, q/ `) v# f应用领域
$ W3 h) n# R' d: u1 OGPS，便携式DVD背光
, b  I+ o1 @5 e& y% j„台灯和房间照明
工业显示屏背光
- Y( \/ E, w8 W' i& p' {! O Description
0 n$ L$ z$ U) q1 R8 qThe AP5503 is a current mode DC/DC converter with
- E, a: _+ b6 e  ]: y* P* q. f$ voutside power NMOS designed to drive LEDs. The
8 }% t7 g& S5 @  G9 TAP5503 operates as a LED driver in buck, boost and
buck-boost mode. The LED current is externally programmable with a 120mV sense resistor. With a
- Q, S5 A/ ~7 U. q& `) O6 Z4 A! ?500KHz operating frequency, the external inductor and
input/output capacitors can all be small. Dimming can
8 M/ r% d% [8 G4 E  Y7 x. jbe either analog, PWM, or PWM converting to analog
$ k# N$ X4 R6 \8 C/ O7 W6 Y! bwith an external capacitor.
3 Y6 z# Z( ~5 j0 e- X- q$ u6 kThe AP5503 is available in MSOP-10 (FD) package.
Features
, G7 N0 d" {) U/ l+ {  L/ W9 z„ High Voltage : VIN up to 60V, VOUT up to 60V
„ Buck, Boost or Buck-Boost Operation
* b# Y1 i/ ?! f# _3 {: W" y„ Current Mode PWM with 500KHz and 200KHz
6 l0 T, ~" Q1 `& _. ]( K' T- A1 oSwitching Frequency
„ Easy dimming : Analog, PWM or PWM Converting to Analog with One External Capacitor
„ Soft Start to Avoid Inrush Current
„ Programmable Over Voltage Protection to Limit
+ S4 H) q9 o! b4 Q) rOutput Voltage
„ VIN Under Voltage Lockout and Thermal Shutdown
- Z& T" k6 s* ^( y# k: Z1 z# A„ MSOP-10 (FD) Package
Applications
: |3 ^+ a1 ~) {) K„ GPS, Portable DVD Backlight
„ Desk Light and Room Lighting
„ Industrial Display Backlight
" t) Z7 [& A+ ?# p9 \- ~8、样板申请联系：
深圳市世微半导体有限公司
4 X- E1 p6 _; G& L4 ]. q如需要了解可以联系欧阳： 18811874036 13714437124（微信）QQ:2355558464
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