RT7331-ZCC7331替代RT7331

Siweidianzi

General Description
) W" p) F9 l: d% B6 gFeatures
1 T, T) ~( [# [% C0 z; n0 D6 RThe ZCC7331 is a dimmable constant current LED driver
with active power factor correction. It suppoZCCs high
power factor across a wide range of line voltages, and
% J0 K" H" k  e& T# D0 J8 qit drives the conveZCCer in the Quasi-Resonant (QR)
3 `4 W8 g( {" w8 @, M1 v5 L2 t8 dmode to achieve the higher efficiency. By using
, ?5 t5 G- r$ X% q; l, T2 iPrimary Side Regulation (PSR), the ZCC7331 controls
the output current accurately without a shunt regulator
and an opto-coupler at the secondary side, reducing
. F- w# Q# V3 O( ?the external component count, the cost, and the
volume of the driver board.
 Tight LED Current Regulation
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SmaZCC CC/CV Mode Control
Wide Dimming Range (1% to 100%)
Power Factor Correction
THD Optimization (THD < 10%)
Quasi-Resonant (QR) Operation
: c- i+ H% m6 `$ p% [Fast StaZCCup
Adjustable CV level
Soft Drive for the Better EMI PeRFormance
: U( J, m. ^0 \Multiple Protection Features
The ZCC7331 is compatible with the analog dimming.
The output current can be modulated by the PWM duty
5 C3 e% X) |3 w0 Jratio or the average level of DIM pin.
LED Open-Circuit Protection
0 J4 |, j# K. ]8 Z
, i, `" Q) `' J  j LED ShoZCC-Circuit Protection
 Over Load Protection
2 Y) v5 w) ~9 MThe ZCC7331 embeds comprehensive protection
functions for robust designs, including LED open-circuit
" E: }" h9 v0 P% rprotection, LED shoZCC-circuit protection, output diode
shoZCC-circuit protection, VDD Under-Voltage Lockout
(UVLO), VDD Over-Voltage Protection (VDD OVP),
over load protection, input under / over voltage
! g9 ~" @8 L" F+ k6 _" e Input Under / Over Voltage Protection
 Output Diode ShoZCC-Circuit Protection
0 {/ V/ X& |& M1 [+ M4 i VDD Under Voltage Lockout
1 q# y5 O% k8 p) r1 W! }  A( C VDD Over Voltage Protection
# f; J) y5 I6 }7 ]7 eExternal / Internal OTP
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6 I* u% T. }5 E. h4 Z8 o* [  iprotection, external / internal Over-Temperature
5 o" H2 a% b( v5 S/ F4 Y3 W Cycle-by-Cycle Current Limitation
0 n1 j* `& y2 f' f& o5 _: T% qProtection (OTP), and cycle-by-cycle current limitation.
Applications
" ^+ O9 z$ n$ y' A* C+ p4 k" L1 ~ AC-DC LED Lighting Driver
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