RT7331-ZCC7331

Siweidianzi

General Description
Features
The ZCC7331 is a dimmable constant current LED driver
5 o9 h& U. m. H" rwith active power factor correction. It suppoZCCs high
- @4 E, N. T# ?2 d9 v$ P: ]7 `9 fpower factor across a wide range of line voltages, and
it drives the conveZCCer in the Quasi-Resonant (QR)
2 c. g/ H8 f3 n8 I% Mmode to achieve the higher efficiency. By using
! i' e: B4 \4 I: u5 vPrimary Side Regulation (PSR), the ZCC7331 controls
- u" C% P0 s' b, q8 |8 J! Jthe output current accurately without a shunt regulator
and an opto-coupler at the secondary side, reducing
) a% @5 Q/ ~: x5 ]7 P2 ythe external component count, the cost, and the
  X% ^! j9 z- j* K; B# _. C- Fvolume of the driver board.
Tight LED Current Regulation
SmaZCC CC/CV Mode Control
7 a& I' P% V$ z; ]) H8 e/ L  \- VWide Dimming Range (1% to 100%)
1 Z. v1 N2 i4 b4 V9 `) L1 vPower Factor Correction
. |5 C' j; _6 ]4 X" V2 `7 l' I1 f# QTHD Optimization (THD < 10%)
9 x8 D) t2 q' O  GQuasi-Resonant (QR) Operation
Fast StaZCCup
  c. k# r) G1 C) ~" @) \Adjustable CV level
# m) {; b9 {; ]2 a/ bSoft Drive for the Better EMI PeRFormance
Multiple Protection Features
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
6 m9 a7 X. N6 k" X& Y: R7 GLED ShoZCC-Circuit Protection
: m0 H0 A5 r+ Y2 T  |" TOver Load Protection
The ZCC7331 embeds comprehensive protection
. [# e) O1 J5 J8 W9 Q5 [1 ]/ t* L/ M2 Xfunctions for robust designs, including LED open-circuit
9 E3 a9 q( f# V  E4 R; ?protection, LED shoZCC-circuit protection, output diode
. M( K' H. G  \shoZCC-circuit protection, VDD Under-Voltage Lockout
3 G! X1 J7 q# x9 ?. Z! C, c  \(UVLO), VDD Over-Voltage Protection (VDD OVP),
# v" x2 W3 s+ z5 o8 p$ `over load protection, input under / over voltage

! T0 z; s7 U7 w7 w5 d) l9 b; w0 vInput Under / Over Voltage Protection
/ c7 M! X$ q% `1 X" {9 L
Output Diode ShoZCC-Circuit Protection

VDD Under Voltage Lockout

4 F% h" p# c( k/ d* ~5 U5 C% m3 VVDD Over Voltage Protection
* v3 S1 C0 N, K8 kExternal / Internal OTP
. N: P# d, `# F
protection, external / internal Over-Temperature

7 ?8 a% f. R& pCycle-by-Cycle Current Limitation
( L( h0 [' \5 g  dProtection (OTP), and cycle-by-cycle current limitation.
( I. F8 Z3 \2 R# v7 j9 x RT7331-ZCC7331媲美RT7331(1).pdf (3.18 MB, 下载次数: 0)

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