RT7331-ZCC7331替代RT7331

Siweidianzi

General Description
Features
The ZCC7331 is a dimmable constant current LED driver
! \# C4 y  {0 `8 |& z. pwith active power factor correction. It suppoZCCs high
/ f) _' e8 |1 S' Z% P* |* F# Epower factor across a wide range of line voltages, and
it drives the conveZCCer in the Quasi-Resonant (QR)
5 A! K5 @5 d/ f5 Z+ P6 ^9 n( G5 Smode to achieve the higher efficiency. By using
% F6 Z$ S" B5 [2 N: HPrimary Side Regulation (PSR), the ZCC7331 controls
the output current accurately without a shunt regulator
8 R. Q# j: l& G. n' m) n: v/ ]and an opto-coupler at the secondary side, reducing
. Q* y7 E; Z' e, D- M. ?* G8 K1 |the external component count, the cost, and the
volume of the driver board.
4 [0 K! r3 {( }0 } Tight LED Current Regulation
  b6 n/ X, g8 c5 V3 u
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SmaZCC CC/CV Mode Control
$ I& G7 e) v8 _Wide Dimming Range (1% to 100%)
Power Factor Correction
THD Optimization (THD < 10%)
8 A. U: z) K; }2 U' ~Quasi-Resonant (QR) Operation
Fast StaZCCup
& S- P* U+ _% CAdjustable CV level
Soft Drive for the Better EMI PeRFormance
- r' q& I% L/ a# u! D( W' w: h% QMultiple Protection Features
6 J( S2 P/ [+ oThe 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.
5 a; I! W* V' {2 B  zLED Open-Circuit Protection
$ C, P: S- W% I( Z+ {+ N- c
3 N+ q9 T% X* w) j" J* v- o' v! V9 [ LED ShoZCC-Circuit Protection
2 Z% U5 T* o' K8 s' u3 s Over Load Protection
3 q8 F$ t# ^" b" t! f; O( Z' e* Y" pThe ZCC7331 embeds comprehensive protection
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),
* O* [# e. W& `5 ?  D) G8 Uover load protection, input under / over voltage
* H1 P3 L. y! [; M, y% V- E: z Input Under / Over Voltage Protection
$ ?9 ~% m" g: B" X, D, V Output Diode ShoZCC-Circuit Protection
 VDD Under Voltage Lockout
* n* h. h3 e$ b4 i VDD Over Voltage Protection
* F% f) a. G9 Y9 ^% E  y! {/ ?External / Internal OTP
) T2 V- L" B. h+ J
protection, external / internal Over-Temperature
 Cycle-by-Cycle Current Limitation
Protection (OTP), and cycle-by-cycle current limitation.
& s7 p  z  G+ n0 C" w4 c) r2 E( OApplications
 AC-DC LED Lighting Driver

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