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GENERAL DESCRIPTION
- W3 ~. E3 c# ^: G5 VThe ZCC3302 is a 7.5V step-up DC/DC converter
3 R- ], V% E4 sdesigned for driving up to single 10-series or( I8 `2 a8 B8 l1 z
9x3-series WLEDs from a single cell Lithium Ion-5 K% _' F! y; A+ u7 q1 P) {
battery.% z4 |5 {( |' J
The ZCC3302 uses current mode, fixed frequency
+ t3 _ S9 d$ k% F1 ~ s8 barchitecture to regulate the LED current, which is
$ q! W" j" h( ameasured through an external current sense resistor.
2 e) g5 h, r- x" E) D2 gIts low 300mV feedback voltage reduces power loss
9 ?& h) p# m. l% R0 G- fand improves efficiency. The ZCC3302 supports hig-
7 C$ h- w& X5 u6 _9 P2 ?# Sh frequency PWM Dimming through EN pin.
" T$ `# V4 O; M6 R' [7 Q; ?The ZCC3302 is turned off if an open-circuit condition
, o( M: ]( C7 `8 ]is presented. Please be noted that open-circuit8 `0 i9 k; d9 t* d) ^& x5 h
condition is not the same as over-voltage condition..
( D3 c" f- u9 V" ~9 v0 n( ePlease refer to the OPERATION DESCRIPTION and: H3 Y6 t3 L$ k2 J: B
APPLICATION INFORMATION sections for more2 t4 b/ J$ I, ]7 D7 T
detail., e e& }5 X; i
The ZCC3302 includes soft-start, under-voltage locko-# T9 y" j! \3 @. Z0 j+ P
ut, current limiting and thermal overload protections.
V* e/ ?4 A! P6 | I/ X& \1 RThe ZCC3302 is available in SOT23-6 package.9 {. P; V" ]7 f! g) b! O/ g& M
FEATURES! v9 x! W) s' B
Operating Voltage: 2.5-7.5V
- @ _3 d) a/ x6 B( ~! x1 t6 r: A Maximum Output Voltage: 35V, capable of
( o+ z" Q- \2 q% X' m, Edriving 10-series White LED strings u2 s( Y" W' \
Maximum drive Capability: 9x3-series or' p8 v" ^: i I: e+ N5 Y g2 r4 N
6x6-series." z' R% ]3 z, M
Up to 90% Efficiency& J3 m9 V; V8 [0 C: e
1.25MHz Fixed Switching Frequency
+ j! q5 O- o& [! l Low 300mV Feedback Voltage
6 i z0 Z2 v; X) f Support PWM Dimming5 w5 y7 j- R9 G w
Open-circuit Protection
2 Q" u; K" p# j- k! u/ a UVLO, Soft-Start and Thermal Shutdown
5 y, q! _2 \1 i; C$ { Internal 1.5A Current Limit, r$ [0 k! h( ^
SOT23-6 Package
, H- s1 z! L6 x* I% W: K* SAPPLICATIONS
: R- m9 w& I+ ]3 w5 r7 Y 5~7” LCD Panels) o' a" [# g, ^3 P+ K
Handheld Computers and PDAs
& n' j& s6 K0 o) U4 }, i Digital Cameras2 ]. h% x' K2 Y$ o1 U
Small LCD Displays; L, X# S$ V8 `; n& y6 j
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发表于 2023-5-30 17:05
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