RT7331-ZCC7331

Siweidianzi

General Description
4 }$ _9 ^) W$ _: TFeatures
: k# N8 H* f% S( O) v. [$ s7 {The ZCC7331 is a dimmable constant current LED driver
* C' B8 L+ l$ h0 ywith active power factor correction. It suppoZCCs high
" h8 z) X1 G! X# I" u7 Ipower factor across a wide range of line voltages, and
it drives the conveZCCer in the Quasi-Resonant (QR)
/ L! B$ Y' ?& k: e3 qmode to achieve the higher efficiency. By using
' p! Q2 a5 i. C8 ~  C% {Primary Side Regulation (PSR), the ZCC7331 controls
the output current accurately without a shunt regulator
and an opto-coupler at the secondary side, reducing
the external component count, the cost, and the
+ i0 \! K9 Z( Hvolume of the driver board.
Tight LED Current Regulation
' t& Z/ ]( |* w5 VSmaZCC CC/CV Mode Control
  Q* z6 A2 h. M# ?# YWide Dimming Range (1% to 100%)
Power Factor Correction
& {; n( P% C# ^# WTHD Optimization (THD < 10%)
; a' W8 K  E5 s3 V8 k* o- DQuasi-Resonant (QR) Operation
Fast StaZCCup
! D% `8 O, u4 ?  k1 Q" v: T3 hAdjustable CV level
/ J6 c) g$ L' z& z8 E. tSoft Drive for the Better EMI PeRFormance
Multiple Protection Features
$ J% G6 A8 w% }6 [The ZCC7331 is compatible with the analog dimming.
The output current can be modulated by the PWM duty
ratio or the average level of DIM pin.
LED Open-Circuit Protection
LED ShoZCC-Circuit Protection
7 I( U+ \# J, m+ ^Over Load Protection
The ZCC7331 embeds comprehensive protection
/ Y* _- l( i0 kfunctions for robust designs, including LED open-circuit
9 g5 X6 a/ Q9 y6 l7 q+ zprotection, LED shoZCC-circuit protection, output diode
2 C/ j% t5 Y$ DshoZCC-circuit protection, VDD Under-Voltage Lockout
" l+ P5 }- e3 \8 @8 ](UVLO), VDD Over-Voltage Protection (VDD OVP),
8 P3 K2 w" }; {. Gover load protection, input under / over voltage
. g3 Y7 w" a) n- A% B
  @) N5 P1 a  LInput Under / Over Voltage Protection
# s: i% g4 @* P
$ s( G' m6 W( U- I& u2 j7 MOutput Diode ShoZCC-Circuit Protection
8 ~/ d, _, ~# ?3 q! W% [# G! _, A
9 n. n2 E! n' h- n$ kVDD Under Voltage Lockout

, G  U0 x+ n! mVDD Over Voltage Protection
External / Internal OTP

protection, external / internal Over-Temperature

% `# v) x9 A) pCycle-by-Cycle Current Limitation
- X* w3 ?2 K+ q+ m5 p$ LProtection (OTP), and cycle-by-cycle current limitation.
2 m/ f8 r# M6 }# R RT7331-ZCC7331媲美RT7331(1).pdf (3.18 MB, 下载次数: 0)

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