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General Description ! l5 H/ j6 {8 I# K9 @/ R
Features
/ W" m( V: r6 n9 Z8 m" iThe ZCC7331 is a dimmable constant current LED driver
! b) A. o/ W8 u; K. @with active power factor correction. It suppoZCCs high
7 ~3 s; U& |6 A0 H) b8 q% upower factor across a wide range of line voltages, and
: i% I7 K1 _7 k) M5 Zit drives the conveZCCer in the Quasi-Resonant (QR)& k2 c- S$ L( b2 Q3 u/ s. B3 |# y
mode to achieve the higher efficiency. By using0 c' b# N% ]- e* T; `5 n8 q/ l
Primary Side Regulation (PSR), the ZCC7331 controls# v, J- V" f: _, y
the output current accurately without a shunt regulator- _; `+ l* Z, h8 M3 w. s( V2 y, v, ^
and an opto-coupler at the secondary side, reducing |! L, b% K# |5 X$ E3 b$ o) O% S" e
the external component count, the cost, and the
0 z; |9 g6 m' V4 u7 l. f- v) uvolume of the driver board.
5 \* f2 U4 Y4 y" L5 L; L1 fTight LED Current Regulation $ F0 |* E- a8 M* R$ S
SmaZCC CC/CV Mode Control; r$ O! c1 } e8 u& A
Wide Dimming Range (1% to 100%)2 P+ Q- ^3 X- D% D: ^$ r
Power Factor Correction0 n) s; f& i1 x* G
THD Optimization (THD < 10%)
* a' h* f0 z/ y- a/ wQuasi-Resonant (QR) Operation# i3 h) g1 B6 m
Fast StaZCCup
7 B" A4 f6 t, g% b$ WAdjustable CV level- B4 L2 z- n& R( {) Y9 l
Soft Drive for the Better EMI PeRFormance& G6 F, Z8 }$ R4 i% u4 e [7 I/ h
Multiple Protection Features
6 x( R4 Z3 k6 K# T- n( zThe ZCC7331 is compatible with the analog dimming.6 x x1 m6 d: k% O3 z$ j7 Z" J6 I
The output current can be modulated by the PWM duty; J7 Y' o! D( d6 S& Q8 I
ratio or the average level of DIM pin.' J) @$ o# s$ B8 I; p
LED Open-Circuit Protection
: @8 Q3 ] x' H. S. nLED ShoZCC-Circuit Protection
% t F% B- g. q, c6 f2 qOver Load Protection
) ~; L+ E' G7 ?9 J9 e% d) yThe ZCC7331 embeds comprehensive protection
5 j7 P, V' J4 N6 G7 [functions for robust designs, including LED open-circuit2 d: N5 q% w. O# n
protection, LED shoZCC-circuit protection, output diode) U+ O4 A& ^8 q5 W
shoZCC-circuit protection, VDD Under-Voltage Lockout3 K3 d7 `. {* e- k
(UVLO), VDD Over-Voltage Protection (VDD OVP),# x* f3 j5 y; u4 p0 v7 G4 U
over load protection, input under / over voltage" X8 E4 h: n+ E3 Y" P, P
: x. |6 F& s, T' H- `
Input Under / Over Voltage Protection
3 [& Q9 I) P0 }0 b$ U
( P2 N8 L& d n% [& r1 a/ h/ F1 tOutput Diode ShoZCC-Circuit Protection
8 y2 y- x+ r2 d, M/ K0 [. e- _
, Y5 U4 R) D1 a+ m; R. L' J: [: VVDD Under Voltage Lockout4 I$ d u& m3 x( f
- s* Z9 d3 Z! G( C* UVDD Over Voltage Protection6 ^5 u( @! R O8 r6 q" \- `
External / Internal OTP
5 O- A8 X' t6 z* T( `# M6 t
: ]' l; F2 ^' f3 o# uprotection, external / internal Over-Temperature ; W! D2 q0 t+ ]
2 r. F; k; A. Z# S/ g, [
Cycle-by-Cycle Current Limitation
0 R- w4 ?* J) X! JProtection (OTP), and cycle-by-cycle current limitation.4 [% |5 K! d" s! d" C* R2 Q4 r( g
RT7331-ZCC7331媲美RT7331(1).pdf
(3.18 MB, 下载次数: 0)
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发表于 2021-4-1 13:41
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