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ZXSC440

Features: • Charges a 80F photoflash capacitor to 300V in 3.5 seconds from 3V• Charges various value photoflash capacitors• Over 75% flyback efficiency• Charge and Ready pins• Consumes only 4.5A when not charging• Small MSOP8 low profile packageApplicationR...

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SeekIC No. : 004552578 Detail

ZXSC440: Features: • Charges a 80F photoflash capacitor to 300V in 3.5 seconds from 3V• Charges various value photoflash capacitors• Over 75% flyback efficiency• Charge and Ready pin...

ZXSC440 Data Sheet

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Part Number:
ZXSC440
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: 2024/11/24

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Product Details

Description



Features:

• Charges a 80F photoflash capacitor to 300V in 3.5 seconds from 3V
• Charges various value photoflash capacitors
• Over 75% flyback efficiency
• Charge and Ready pins
• Consumes only 4.5A when not charging
• Small MSOP8 low profile package




Application

• Digital camera flash unit
• Film camera flash unit




Pinout

Connection Diagram




Specifications

PARAMETER LIMIT UNIT
VCC -0.3 to +10 V
DRIVE -0.3 to VCC + 0.3 V
READY -0.3 to VCC + 0.3 V
CHARGE -0.3 to The lower of (+5.0) or (VCC +0.3) V
VFB, SENSE -0.3 to The lower of (+5.0) or (VCC +0.3) V
Operating temperature -40 to +85 °C
Storage temperature -55 to +150 °C
Power dissipation at 25°C 450 mW


Part Number ZXSC440
Type Boost
Min and Max Input Voltage (V) 1.8 ~ 8
Output Voltage (V) Vin to Vm
Frequency (Hz) 200K Fixed
Efficiency (%) 85
Standby Quiescent Current (uA) typ 150





Description

The ZXSC440 is a dedicated photoflash charger, charging an 80F photoflash capacitor to 300V in 3.5 seconds from a 3V supply.

The flyback conversion efficiency is typically 75%, much higher than the commonly used discrete charging circuits.

The Charge pin enables the circuit to be initiated from the camera's microprocessor, using negligible current when flash is not being used.

The Ready pin signals the microprocessor when the flash is charged and ready to be fired.

A small amount of hysteresis on the voltage feedback shuts down the device as long as the capacitor remains fully charged, again using negligible current.






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