ZCC6908HV 替代MP6908 低边反馈

Siweidianzi

DESCRIPTION
8 ~; y5 t5 f7 I& r, sThe ZCC6908HV is a Low-Drop Diode Emulator IC that, combined with an external
! Z2 Y7 W6 H8 L/ {switch, replaces Schottky diodes in high-efficiency Flyback converters. The chip
* f$ Z: T. I7 M6 _# F( ~/ N! nregulates the forward drop of an external Synchronous Rectifier (SR) MOSFET to
about 40mV and switches it off as soon as the voltage becomes negative. ZCC6908HV
+ z7 z/ Y( E8 M! C1 N- Ican generate its own supply voltage for battery charging applications with low output
% o4 p2 D9 @" @+ fvoltage or high side rectification applications. A programmable ringing detection
8 f( @. A" }+ L0 w7 y7 S. _circuitry prevents ZCC6908HV false turn-on during DCM and Quasi-Resonant
operations.
ZCC6908HV is available in space saving TSOT23-6 packages.
! @+ E& N: w0 A7 dFEATURES
● Operates in a wide output voltage range down to 0V
. I3 A9 K' j3 \; p2 J( \9 m8 `  f● Self-supplying for operation with low output voltage
, }- U  e) }" W+ y* r2 [1 Trectification without an auxiliary winding
●· Works with 12V Standard and 5V Logic Level SR MOSFETS
( T; Y& w+ _1 r! z) ~●· Compatible with Energy Star, 1W Standby Requirements
1 Q) A, U* F" p% K●· <30ns Fast Turn-off and Turn-on Delay
●· <100uA Quiescent Current
' }2 v$ s5 p$ R( T& Q9 p●· Supports DCM, Quasi-Resonant and CCM Operations
3 S: ~$ h3 }$ g  f% q●· Supports both High-side and Low-side Rectification
●· Power Savings of Up to 1.5W in a Typical Notebook Adapter
, ]- H, M. T0 {1 W●· TSOT23-6 Package Available
APPLICATIONS
●
- W1 ?1 b9 a. K6 MIndustrial Power Systems
! t$ W9 p$ C7 x& W& o7 Y3 o●
7 S- P! O4 G# A* y& G) c: `8 LDistributed Power Systems
●
Battery Powered Systems
) Y3 ]6 E( A! n# j7 X1 R●
9 T0 D" r; V9 f: R8 YFlyback Converters
1 ?  t, [9 u; D0 `- M