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KB4314

Features: •Operating Voltage:1.8V~6.5V•High Operating Frequency: 1.2MHz•High Output Voltage: Up to 30V(max)•Shutdown Current <1􀁐A•30V Output Over-voltage protection (min)•Digital Dimming Control.•Built-in Cycle-by Cycle Current-limiting.•...

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SeekIC No. : 004384125 Detail

KB4314: Features: •Operating Voltage:1.8V~6.5V•High Operating Frequency: 1.2MHz•High Output Voltage: Up to 30V(max)•Shutdown Current <1􀁐A•30V Output Over-voltage pr...

KB4314 Data Sheet

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Part Number:
KB4314
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/12/20

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Product Details

Description



Features:

•Operating Voltage:1.8V~6.5V
•High Operating Frequency: 1.2MHz
•High Output Voltage: Up to 30V(max)
•Shutdown Current <1􀁐A
•30V Output Over-voltage protection (min)
•Digital Dimming Control.
•Built-in Cycle-by Cycle Current-limiting.
•Built-in Soft-Start Function.
•0.105V Low Reference Voltage(+/-6.6%)
•Tiny SOT23-6 Package
•High Efficiency: Up to 92%
•High Output Power: 1W


Application

• LED Module
• LED Backlight for LCD Display (3.5 ~6.5 )
• Constant Current Source􀀡


Pinout

Connection Diagram


Specifications

Parameter Rated Value Unit
VIN voltage -0.3 to +6.5 V
LX , OVP voltage -0.3 to +30 V
EN , FB to GND -0.3 to +6.5 V
Switch Current (ILX) 0.45 A
Continuous power dissipation (SOT23-6 Ta=+25) 0.35 W
Operating Junction Temperature Range -35 to 85
Lead Temperature (Soldering 5 sec) 260
Storage Temperature -65 to 125
Package Thermal Resistance (JA) 250 /W
ESD Susceptibility (HBM) 2 KV
ESD Susceptibility (MM) 200 V



Description

The KB4314 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 1.2 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 0.105V low reference voltage minimized the power loss across the current-setting resistor.

The KB4314 is available in SOT23-6 packages􀀯




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