RT7331-ZCC7331替代RT7331

Siweidianzi

General Description
Features
9 q5 e) z2 g1 d- K. mThe ZCC7331 is a dimmable constant current LED driver
2 d; m5 s& v  s9 zwith active power factor correction. It suppoZCCs high
power factor across a wide range of line voltages, and
" ^3 {. H1 T% ^& t7 lit drives the conveZCCer in the Quasi-Resonant (QR)
mode to achieve the higher efficiency. By using
Primary Side Regulation (PSR), the ZCC7331 controls
the output current accurately without a shunt regulator
and an opto-coupler at the secondary side, reducing
# ]) \9 A7 b  L+ k  ?the external component count, the cost, and the
* r! @8 s3 R5 B' I% k  {volume of the driver board.
 Tight LED Current Regulation
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
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. u3 q, ?" _; ISmaZCC CC/CV Mode Control
Wide Dimming Range (1% to 100%)
# H" v& ?9 |6 TPower Factor Correction
THD Optimization (THD < 10%)
% K0 ^; |1 d: s5 q/ yQuasi-Resonant (QR) Operation
3 g$ f$ z! H0 X  J9 O! mFast StaZCCup
# ?9 i: H& L  l$ C% ]( ^: SAdjustable CV level
Soft 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
7 ^: S/ s5 ]0 l& Qratio or the average level of DIM pin.
LED Open-Circuit Protection
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 LED ShoZCC-Circuit Protection
) l2 w$ d  [5 B( y7 X  x$ ~ Over Load Protection
The ZCC7331 embeds comprehensive protection
( [; x, f" e: q. z# Zfunctions for robust designs, including LED open-circuit
6 S1 Y3 Z4 h& k2 h4 ?" N+ j) Wprotection, LED shoZCC-circuit protection, output diode
shoZCC-circuit protection, VDD Under-Voltage Lockout
. g* u  U- k; b# O/ [(UVLO), VDD Over-Voltage Protection (VDD OVP),
over load protection, input under / over voltage
 Input Under / Over Voltage Protection
$ D( r- n" ]5 [, _1 _. i Output Diode ShoZCC-Circuit Protection
 VDD Under Voltage Lockout
  K  x: G0 [) e& ?( c8 m0 o VDD Over Voltage Protection
) H$ H" ]: N! \8 ^$ x7 g5 iExternal / Internal OTP
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protection, external / internal Over-Temperature
; {5 C) a( S. A Cycle-by-Cycle Current Limitation
Protection (OTP), and cycle-by-cycle current limitation.
. M! }& _3 u* Y* PApplications
 AC-DC LED Lighting Driver
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