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DESCRIPTION
" d& ]5 m) p2 t/ z% T+ |! JThe ZCC6908HV is a Low-Drop Diode Emulator IC that, combined with an external
2 G7 ^. v3 e2 N$ M% q- Cswitch, replaces Schottky diodes in high-efficiency Flyback converters. The chip
. ^) c# I* x5 Eregulates the forward drop of an external Synchronous Rectifier (SR) MOSFET to
! q% q: K" m' M) d( W: p X( \5 Sabout 40mV and switches it off as soon as the voltage becomes negative. ZCC6908HV
; q- B2 }& _* h6 |% }! gcan generate its own supply voltage for battery charging applications with low output6 P6 Z" H- r% h
voltage or high side rectification applications. A programmable ringing detection2 E# K$ J/ U1 v2 X7 Z7 w. O
circuitry prevents ZCC6908HV false turn-on during DCM and Quasi-Resonant
8 ^/ ^$ W1 o# n( v: x' @operations.* R- f& D- w" `* N: _. W
ZCC6908HV is available in space saving TSOT23-6 packages.2 y* y" ?8 Z+ j% J/ g$ I
FEATURES0 f: Y/ E5 y' h1 b8 V9 Y+ G
● Operates in a wide output voltage range down to 0V
, ] k( W O! i$ a7 S4 l# @● Self-supplying for operation with low output voltage
+ ~) W w" B8 a# l5 ^, p2 s2 _: wrectification without an auxiliary winding8 @/ L! l: M3 D, Z# W% ^: ~! x5 _1 L+ e
●· Works with 12V Standard and 5V Logic Level SR MOSFETS5 U9 z$ ~/ C1 [" j; T
●· Compatible with Energy Star, 1W Standby Requirements
! X8 Z# ]- v& o2 O; E0 p●· <30ns Fast Turn-off and Turn-on Delay( A) [3 P6 Y- [5 S2 ]- b
●· <100uA Quiescent Current
6 w7 |. B/ Y' b' }# _●· Supports DCM, Quasi-Resonant and CCM Operations
8 v3 g4 _4 G( B/ r4 u2 Y0 ~9 K●· Supports both High-side and Low-side Rectification! y4 i7 v* P+ W/ |2 l* A$ ^" M
●· Power Savings of Up to 1.5W in a Typical Notebook Adapter' w0 E" ?9 Y$ d2 m1 y" m+ i
●· TSOT23-6 Package Available1 z$ z; w. e `( M8 g- n
APPLICATIONS
: H+ l8 Q, c4 N. F& ^! p* H" l. L●
3 ~5 X$ j2 v. c7 U; aIndustrial Power Systems% }5 m1 t$ L g' Q) ^, y
●
" F& u9 U: K) l8 w& o. |& f/ c$ bDistributed Power Systems# R: P: H5 ~/ K% i; z" _1 w
●
l4 A( U5 l+ T5 ]( S; f% F7 NBattery Powered Systems
$ Z2 o+ v; W' {+ s) V4 \: m●
4 `- ~: T- w4 O8 O" yFlyback Converters
1 o& w; `* j& K. b% r
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发表于 2021-11-19 18:01
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