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ACT6358

Features: ` High-Efficiency DC/DC WLED Bias Supply` Internal 40V, 0.55 Power MOSFET` Up to 10 WLEDs per String` Two Peak Current Options:- ACT6357: 0.5A- ACT6358: 1A` Supports Analog and PWM LED Dimming` Integrated Over-Voltage Protec...

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SeekIC No. : 004268023 Detail

ACT6358: Features: ` High-Efficiency DC/DC WLED Bias Supply` Internal 40V, 0.55 Power MOSFET` Up to 10 WLEDs per String` Two Peak Current Options:- ACT6357: 0.5A᠄...

ACT6358 Data Sheet

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Part Number:
ACT6358
Supply Ability:
5000

Price Break

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

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Product Details

Description



Features:

` High-Efficiency DC/DC WLED Bias Supply
` Internal 40V, 0.55 Power MOSFET
` Up to 10 WLEDs per String
` Two Peak Current Options:
- ACT6357: 0.5A
- ACT6358: 1A
` Supports Analog and PWM LED Dimming
` Integrated Over-Voltage Protection (OVP)
` Programmable Soft-Start Function
` Thermal Shutdown
` Cycle-by-Cycle Over Current Protection
` Tiny TDFN33-8 Package


Application

· TFT LCD Displays
· Smart Phones
· Portable Media Players
· GPS/Personal Navigation Devices


Pinout

Connection Diagram


Specifications

PARAMETER
VALUE
UNIT
SW to G
-0.3 to 42
V
IN, EN to G
-0.3 to 6
V
FB, OV, BC, SS to G
-0.3 to VIN + 0.3
V
Continuous SW Current
Internally Limited
Junction to Ambient Thermal Resistance (JA)
42.5
°C/W
Maximum Power Dissipation
1.9
W
Operating Junction Temperature
-40 to 150
°C
Storage Temperature
-55 to 150
°C
Lead Temperature (Soldering, 10 sec)
300
°C


: Do not exceed these limits to prevent damage to the device. Exposure to absolute maximum rating conditions for long periods may affect device reliability.




Description

The ACT6357 and ACT6358 step-up DC/DC converters drive white LEDs with an externally programmable constant current. These devices feature integrated, 40V power MOSFETs that are capable of driving up to ten white LEDs in series, providing inherent current matching for uniform brightness. WLED brightness adjustment is easily achieved via a dual-function pin, which accepts either a PWM or an analog dimming control signal.

The ACT6357 and ACT6358 feature a variety of protection circuits, including integrated over voltage protection (OVP), programmable soft-start, cycleby- cycle current limiting, and thermal shutdown protection circuitry.

The ACT6357 has 500mA current limit, while the ACT6358 has 1A current limit. Both parts are available in a small 3mm x 3mm 8-pin TDFN33-8.




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