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KB4313 Dataheets PDF



Part Number KB4313
Manufacturers Kingbor Technology
Logo Kingbor Technology
Description Constant Current 12 Watt Boost White-LED Driver
Datasheet KB4313 DatasheetKB4313 Datasheet (PDF)

Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 KB4313 High Efficiency, Constant Current 12 Watt Boost White-LED Driver FEATURES •Operating Voltage:2.4V~6.5V •High Operating Frequency: 1.5MHz •High Efficiency: Up to 95% •High Output Voltage: Up to 34V(max) •High Output Power: Up to 12W(Vin=12V) •Shutdown Current <1PA •16V Output Over-voltage protection (min) •Digital Dimming Control. •Built-in Cycle-by Cycle Current-limiting. •Built-in Soft-Start Function. •0.2V Low Ref.

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Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 KB4313 High Efficiency, Constant Current 12 Watt Boost White-LED Driver FEATURES •Operating Voltage:2.4V~6.5V •High Operating Frequency: 1.5MHz •High Efficiency: Up to 95% •High Output Voltage: Up to 34V(max) •High Output Power: Up to 12W(Vin=12V) •Shutdown Current <1PA •16V Output Over-voltage protection (min) •Digital Dimming Control. •Built-in Cycle-by Cycle Current-limiting. •Built-in Soft-Start Function. •0.2V Low Reference Voltage(3%) •Tiny SOT23-6 Package APPLICATIONS • LED Module • LED Backlight for LCD Display(7”~21” ) • Constant Current Source! • USB host DESCRIPTION The KB4313 step-up converter drives white LEDs with a constant current to provide backlight in cell phones, PDAs, and other hand-held devices. It features allowing series connection of the white LEDs so that the LED currents are identical for uniform brightness. An enable input can be pulsed repeatedly to adjust LED’s brightness. The fast 1.5 MHz current-mode PWM control allows for smaller capacitor and inductor. Fault condition protection uses cycle-by-cycle current limiting to sense maximum inductor current, thermal protection and over-voltage protection. Also included soft-start eliminates inrush current during start-up. The 0.2V low reference voltage minimized the power loss across the current-setting resistor. The KB4313 is available in SOT23-6 packages / SIMPLIFIED BLOC DIAGRAM VIN EN FB OVP ON/OFF Control Logic / PWM Dimming Control CTL VREF(200mV) + - VREF 0.2V VBG 1.23V Soft-Start Control Logic 16V-20V(6.5uA) VBG + - Overvoltage Protection Current Limit 1.4A + - N CTL GND LX REV: 2.0 1 Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 PIN CONFIGURATION SOT23-6 KB4313 High Efficiency, Constant Current 12 Watt Boost White-LED Driver 313 xxxxx ORDER INFORMATION Part number KB4313 GRE Package SOT23-6, Green x x x x x : Date Code Marking 313, Date Code with one bottom line PIN DESCRIPTION Pin N0. Symbol 1 LX 2 GND 3 FB 4 EN 5 OVP 6 VIN I/O I P I I I P Description Step-up Regulator N-MOS Drain. Place output diode and inductor. Ground Step-Up Regulator Feedback Input. Connect a sense resistor from FB to ground. Enable and Dimming Control Input. LED brightness and IC shutdown are controlled by the voltage on EN. Driving low for longer than 4ms to shutdown the IC. Over-voltage protection input. Connect to the output. Power supply. REV: 2.0 ABSOLUTE MAXIMUM RATINGS (Note 1) Parameter VIN voltage LX , OVP voltage EN , FB to GND Switch Current (ILX) Continuous power dissipation (SOT23-6 Ta=+25 OC) Operating Junction Temperature Range Lead Temperature (Soldering 5 sec) Storage Temperature Package Thermal Resistance (ӘJA) ESD Susceptibility (HBM) ESD Susceptibility (MM) Rated Value -0.3 to +6.5 -0.3 to +35 -0.3 to +6.5 1.4 0.35 -35 to 85 260 -65 to 125 250 2 200 Unit V V V A W к к к к/W KV V Note1:Permanent device damage may occur if Absolute Maximu.


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