ZCC3302 替代MP3302

四维电子

GENERAL DESCRIPTION
The ZCC3302 is a 7.5V step-up DC/DC converter
5 a; a) Z! P) G4 |3 j. Y; Xdesigned for driving up to single 10-series or
4 b& J- i7 c1 Y# G/ ~9x3-series WLEDs from a single cell Lithium Ion-
battery.
- W1 c6 U; d- l# f" J1 n- g* fThe ZCC3302 uses current mode, fixed frequency
architecture to regulate the LED current, which is
measured through an external current sense resistor.
Its low 300mV feedback voltage reduces power loss
and improves efficiency. The ZCC3302 supports hig-
h frequency PWM Dimming through EN pin.
0 Q: |5 Y* M( j( x; T6 sThe ZCC3302 is turned off if an open-circuit condition
is presented. Please be noted that open-circuit
6 i7 i2 u0 l" O5 R; g- D4 N( e* n+ hcondition is not the same as over-voltage condition..
8 P0 k# i2 X) Y- R' [+ BPlease refer to the OPERATION DESCRIPTION and
4 M+ i0 O- p3 m. j% f8 jAPPLICATION INFORMATION sections for more
( S) q2 I! F# O  G! k# Ydetail.
The ZCC3302 includes soft-start, under-voltage locko-
- U6 A' Y$ l, n4 _+ @ut, current limiting and thermal overload protections.
$ z0 T. y* Z! q7 I9 uThe ZCC3302 is available in SOT23-6 package.
FEATURES
7 ?, L2 V) T+ m Operating Voltage: 2.5-7.5V
2 @+ C. ^5 t, H5 B4 c8 }8 } Maximum Output Voltage: 35V, capable of
driving 10-series White LED strings
1 `  x8 m! o7 c! ?3 ?5 \% K Maximum drive Capability: 9x3-series or
6x6-series.
 Up to 90% Efficiency
* b& D/ H6 m2 f9 ]( C9 W- p 1.25MHz Fixed Switching Frequency
 Low 300mV Feedback Voltage
4 m; W! f6 m$ G& j3 U Support PWM Dimming
 Open-circuit Protection
 UVLO, Soft-Start and Thermal Shutdown
4 i% `( d; K, | Internal 1.5A Current Limit
1 u& a; F" V7 {4 m SOT23-6 Package
% d, k7 b7 ?4 n6 \: B3 [: F/ u& f/ RAPPLICATIONS
3 M) e  k( ~( S: i/ N 5~7” LCD Panels
 Handheld Computers and PDAs
 Digital Cameras
 Small LCD Displays
/ o  F7 p& C: b' j