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General Description
, u$ l( ^9 Q4 GFeatures: z/ D3 v+ }0 ~& _1 u* x5 {
The ZCC7331 is a dimmable constant current LED driver
5 v3 H2 x! Z2 Q! `2 N! ywith active power factor correction. It suppoZCCs high) k5 N8 [* S8 `3 \ h7 _
power factor across a wide range of line voltages, and7 T& r8 \' n7 {; p* Q% f2 [- h; J+ v
it drives the conveZCCer in the Quasi-Resonant (QR); h* I3 \9 t8 A; P/ d9 \4 c
mode to achieve the higher efficiency. By using( b; i5 X0 v8 l2 K
Primary Side Regulation (PSR), the ZCC7331 controls9 _& c# S& h i
the output current accurately without a shunt regulator
; X/ i D2 q( z1 n" fand an opto-coupler at the secondary side, reducing
( y, ^0 M# v3 ]! \* Z3 dthe external component count, the cost, and the# t, a- i1 f% i' B
volume of the driver board.: m, ?) N( b% C1 Y! @6 D" e7 j
Tight LED Current Regulation
# `: e! [. v7 }SmaZCC CC/CV Mode Control: d" M/ b5 a! ~
Wide Dimming Range (1% to 100%)
D! _; o) P0 r! G3 KPower Factor Correction+ }2 L- J" r" b T; P
THD Optimization (THD < 10%)4 L; h7 q! W% d2 i" I4 T* D( W/ g
Quasi-Resonant (QR) Operation
0 h% @' |9 u, B8 o k; R* PFast StaZCCup
! ?# V6 R8 b eAdjustable CV level" k' Z z; C; U$ _0 [; d
Soft Drive for the Better EMI PeRFormance
* E8 ~( c( Y# L9 RMultiple Protection Features
6 F4 t! S( H% ^' `" S6 Q' pThe ZCC7331 is compatible with the analog dimming.5 }# K+ o" P2 a0 Z" w2 s# @
The output current can be modulated by the PWM duty
7 C5 I$ w3 @" F/ z' Rratio or the average level of DIM pin.! q* R# U) g4 f+ `! Q. x* L
LED Open-Circuit Protection + c8 P# U0 [/ t' m; m: S6 e
LED ShoZCC-Circuit Protection
; M; y* O2 G6 s2 h1 e% Z" y9 vOver Load Protection3 L7 y1 i4 @) @ J% {- n! Z
The ZCC7331 embeds comprehensive protection3 Q$ G! n7 M8 I- Z% u- H. a# ]
functions for robust designs, including LED open-circuit% [* I! S0 _. ]1 V
protection, LED shoZCC-circuit protection, output diode
. z9 W2 |( A: g' d+ EshoZCC-circuit protection, VDD Under-Voltage Lockout
1 t- l Y5 D! I(UVLO), VDD Over-Voltage Protection (VDD OVP),
; F; O+ }: c# [7 Q# d) x( M" hover load protection, input under / over voltage& V! q/ F' W/ R
3 z1 o+ H3 H1 k) hInput Under / Over Voltage Protection
$ A2 K9 `6 l$ y- t3 S+ A* E6 E
, G6 [- J& B5 V' B+ DOutput Diode ShoZCC-Circuit Protection
0 u# r. r7 H0 m$ p9 f* b - _2 U C8 h% w6 [+ W
VDD Under Voltage Lockout
- |9 d8 |1 a/ H Y# Y% I7 v . P/ j2 K/ F* C5 i% F
VDD Over Voltage Protection
: u# l4 Q7 w% X7 j9 f. ]External / Internal OTP
1 i7 w0 y! I& U1 e; f
- k ^+ ]) s# c$ yprotection, external / internal Over-Temperature 3 t S$ g0 `* o+ ^, S
( }$ ?3 |9 P- l- |* i
Cycle-by-Cycle Current Limitation& K5 i( u; L$ v6 \8 _1 j
Protection (OTP), and cycle-by-cycle current limitation.- D6 H, ^, x5 `8 l8 ?/ I
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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