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DESCRIPTION
Z3 ^5 D) v7 ]8 l6 Z+ ~) MThe ZCC6908HV is a Low-Drop Diode Emulator IC that, combined with an external
{! Y1 _( l" v9 T% A# b/ Sswitch, replaces Schottky diodes in high-efficiency Flyback converters. The chip8 T' C% E% |3 Z5 D" Y5 T+ n; T% Q
regulates the forward drop of an external Synchronous Rectifier (SR) MOSFET to
2 E! s* x! o e8 D" Babout 40mV and switches it off as soon as the voltage becomes negative. ZCC6908HV
2 G. g O r& X; x4 T$ ican generate its own supply voltage for battery charging applications with low output
; W$ \% U7 t7 P8 ]3 ]# e; evoltage or high side rectification applications. A programmable ringing detection
! y7 j1 [8 D6 T qcircuitry prevents ZCC6908HV false turn-on during DCM and Quasi-Resonant
5 H) p' r1 }, U+ @! d% Joperations.
3 d. x9 i) R6 f% {7 T9 TZCC6908HV is available in space saving TSOT23-6 packages.
6 ^: y6 ^4 a# A J0 W8 KFEATURES3 z- u4 i& l3 w/ W* X% n
● Operates in a wide output voltage range down to 0V
% W* c' y- J- w8 g$ L d● Self-supplying for operation with low output voltage
! V( j5 a+ ~; w+ trectification without an auxiliary winding/ g6 |; a6 C0 s- I
●· Works with 12V Standard and 5V Logic Level SR MOSFETS3 u1 {- t3 N# p$ M
●· Compatible with Energy Star, 1W Standby Requirements: t0 o9 q- c6 _, L' i) j* d
●· <30ns Fast Turn-off and Turn-on Delay2 N: W& M" O: Q3 x/ I+ e4 c" E
●· <100uA Quiescent Current4 t" O0 I3 ~. Z/ L
●· Supports DCM, Quasi-Resonant and CCM Operations8 Y+ C- z5 h# e1 W* W
●· Supports both High-side and Low-side Rectification+ U6 a: B: J) Q8 G
●· Power Savings of Up to 1.5W in a Typical Notebook Adapter% t) [( \+ U6 k, L* ` R
●· TSOT23-6 Package Available2 C- m* g+ L9 Q2 R# h2 Z9 U! f d
APPLICATIONS
' q: R* A2 v( ]- a! t● 5 X! R: |8 M! G4 V$ C
Industrial Power Systems
0 i' d) ~4 t5 e x) d. N● $ D' G/ b6 q* r
Distributed Power Systems+ b( A8 G- ?+ p' o
● % r8 T2 r. f/ e( _+ \' n4 ?9 Z
Battery Powered Systems3 n# t7 ^" }" M8 d: Z* E( U
●
5 E1 @( y1 m" @' v/ L4 n$ o3 gFlyback Converters
4 B7 G' G7 O7 B. F, }" H% L1 @% s! y' [; P, D
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发表于 2021-12-1 16:52
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