相关商品： KB3308 RT9284 PT4101 LP3302S SY7201 TP3915 TP3992 TP3919 TP3990 TP3989 MP3302 MP1528 MP3202 AT1308 G5125 YB1517 VIC2513 HE3602

用在双节上可以驱动3串9并，单节只能到3串7并

DESCRIPTION
The TP3984 is a constant current step-up converter specifically designed to drive white LEDs. The Step-up converter  topology  allows  series  connection  of  the white LEDs so the LED currents are identical for uniform brightness. The TP3984 switches at 1.1MHz, allowing  the  use  of  tiny  external  components. The input and output capacitor can be as small as 1µF, saving space and cost versus alternative solutions. A low 0.25V feedback voltage minimizes power loss in the   current   setting   resistor   for   better   efficiency. TP3984  is enhanced with Soft-Start function and that could significantly reduce  noise induced by capacitor.
The TP3984 is available in low profile SOT23-6 package.

FEATURES
·2.6V to 5.5V Input Range
·27V Output with Over Voltage Protection
·High Efficiency :85 % Typical
·Internal Soft-Start
·PWM Dimming Control
·Internal High Power 30V MOSFET Switch
·Fast 1.1MHz Switching Frequency
·Small, Low-Profile Inductors and Capacitors
·SOT23-6 Package
·RoHS Compliant and 100% Lead (Pb)-Free

APPLICATIONS
·Mobile Phone
·Digital Still Camera
·PDAs, Handheld Computers
·MP3 Players
·GPS Receivers

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