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DESCRIPTION+ D7 O4 g, P' p2 g
The ZCC6908HV is a Low-Drop Diode Emulator IC that, combined with an external
6 j J; \2 R: i0 y" ]: C: ?switch, replaces Schottky diodes in high-efficiency Flyback converters. The chip
: d1 O# {8 h1 N- r% b( K% tregulates the forward drop of an external Synchronous Rectifier (SR) MOSFET to
* ]4 t- `- ]# w& `) t$ X0 R3 ^about 40mV and switches it off as soon as the voltage becomes negative. ZCC6908HV
! C1 H/ x6 N. b' @: fcan generate its own supply voltage for battery charging applications with low output
4 R, ]8 _+ o P9 N* I/ fvoltage or high side rectification applications. A programmable ringing detection8 U( e& w0 Z2 ]
circuitry prevents ZCC6908HV false turn-on during DCM and Quasi-Resonant' O' D3 c* i4 G& F% [8 b {
operations.
- w) V! V& c( Z. h& h; j4 }ZCC6908HV is available in space saving TSOT23-6 packages.
: x+ R5 k3 h# X7 t1 U! zFEATURES* I3 ^% }1 |8 J0 |
● Operates in a wide output voltage range down to 0V
j' h& y# E2 E● Self-supplying for operation with low output voltage
' w" N- Z' V5 Y- q3 @rectification without an auxiliary winding
. a- r/ G% q. O, r9 t. n6 y+ ^●· Works with 12V Standard and 5V Logic Level SR MOSFETS! Z9 h9 a7 q3 w( \5 w1 ~2 `
●· Compatible with Energy Star, 1W Standby Requirements
. c: m5 v8 I$ r4 s" y! ~●· <30ns Fast Turn-off and Turn-on Delay
8 o9 P( p$ e ]●· <100uA Quiescent Current" y( ~+ E) J3 j
●· Supports DCM, Quasi-Resonant and CCM Operations# y/ i/ f! X; A+ I4 y
●· Supports both High-side and Low-side Rectification
6 V7 Z5 x8 V9 g# ]●· Power Savings of Up to 1.5W in a Typical Notebook Adapter% g! p2 ]: R2 B7 S- c- G7 r
●· TSOT23-6 Package Available
v8 A! d+ f" j k ^APPLICATIONS) \5 p5 O$ o" Y. Z! w. E
● / _8 b2 `0 s& G# a* h/ p
Industrial Power Systems5 x' S; I/ s: t
● 0 o$ k. i/ i' o; ?1 w
Distributed Power Systems
4 d7 F5 L# D. S, q" O! \" s● 8 ?6 D4 v: I9 W
Battery Powered Systems
& V7 I8 z+ B% ~/ a+ R% p t●
7 D$ \* P/ H- h1 {Flyback Converters . y) Y$ N6 h6 k+ d# N* c) e3 x$ a
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发表于 2021-12-14 17:51
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