RT7331-ZCC7331替代RT7331

Siweidianzi

General Description
Features
; [' p% Q2 n3 X. K/ ~' ]) U5 |The ZCC7331 is a dimmable constant current LED driver
0 W- y' F1 o8 |$ @; ?; Pwith active power factor correction. It suppoZCCs high
9 g, A: ~9 u" S. N; x1 gpower factor across a wide range of line voltages, and
6 p" Q9 O+ F6 j7 s, eit drives the conveZCCer in the Quasi-Resonant (QR)
+ D: i  c: ^" _1 p: Nmode to achieve the higher efficiency. By using
Primary Side Regulation (PSR), the ZCC7331 controls
) A: f& I6 ]% othe output current accurately without a shunt regulator
3 }" W, `$ A+ L# eand an opto-coupler at the secondary side, reducing
4 t1 Y0 b5 P  Rthe external component count, the cost, and the
volume of the driver board.
 Tight LED Current Regulation
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+ g: I! K6 Q& I; q* F
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2 C* C8 Z, w* W2 r; o# gSmaZCC CC/CV Mode Control
! ~( m4 [2 D3 h  FWide Dimming Range (1% to 100%)
Power Factor Correction
THD Optimization (THD < 10%)
* m1 }9 E" A/ z; y* K. {! v: pQuasi-Resonant (QR) Operation
- O, j! g+ C4 C7 KFast StaZCCup
Adjustable CV level
# A) z$ K" Q: v0 k# _5 x* eSoft Drive for the Better EMI PeRFormance
Multiple Protection Features
The ZCC7331 is compatible with the analog dimming.
- a- A2 [& _+ F0 TThe output current can be modulated by the PWM duty
. c2 f7 [5 j! {1 A9 T9 ^ratio or the average level of DIM pin.
& f/ u/ S: ~# k. u; H/ cLED Open-Circuit Protection
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 LED ShoZCC-Circuit Protection
 Over Load Protection
The ZCC7331 embeds comprehensive protection
/ {! G" ?' q! A; E; n' {functions for robust designs, including LED open-circuit
protection, LED shoZCC-circuit protection, output diode
shoZCC-circuit protection, VDD Under-Voltage Lockout
(UVLO), VDD Over-Voltage Protection (VDD OVP),
8 _+ D& d6 C6 w+ n5 {) g# Y: d6 [# {over load protection, input under / over voltage
 Input Under / Over Voltage Protection
/ ?' l, u, q* {4 { Output Diode ShoZCC-Circuit Protection
 VDD Under Voltage Lockout
& {1 F/ f3 a/ R* T6 g VDD Over Voltage Protection
% [3 f. ]9 O7 EExternal / Internal OTP
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# }6 H* q0 u. l" f% n  n2 ?8 xprotection, external / internal Over-Temperature
 Cycle-by-Cycle Current Limitation
Protection (OTP), and cycle-by-cycle current limitation.
Applications
! y2 \7 s& [4 d' d+ @7 k+ d  u AC-DC LED Lighting Driver

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