A8437ECGLT - Brand New Allegro MicroSystems Power Management Specialized - PMIC
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Description
The Allegro® A8437ECGLT is a Xenon photoflash charger IC specifically designed for ultra-low power, small form factor cameras, particularly camera-phones. It offers an adjustable charge current limit ranging from 0.4 to 1.2 A maximum. The A8437ECGLT utilizes primary-side voltage sensing, eliminating the need for a resistive voltage divider on the secondary side of the transformer and reducing leakage currents. This IC also features very low supply current draw, consuming only 0.1 μA in shutdown mode and 10 μA in standby mode, extending battery life.
Specifications and features
- Low quiescent current draw (0.1 μA in shutdown mode)
- Primary-side output voltage sensing; no resistor divider required
- User-adjustable current limit from 0.4 to 1.2 A
- 1.1 V logic (VHI(min)) compatibility
- Integrated IGBT driver with separate sink and source (CG package) or common sink/source (EJ package)
- Flash dual trigger with interlock for increased noise immunity
- Optimized for mobile phone, 1-cell Li+ battery applications
- No primary-side Schottky diode needed
- Zero-voltage switching for lower loss
- >75% efficiency
- Optional regulation feature to maintain the output voltage
- Charge complete indication
- Integrated 40 V DMOS switchApplication Scenarios
The A8437ECGLT is suitable for use in ultra-low power, small form factor cameras, especially camera-phones. It is optimized for mobile phone and 1-cell Li+ battery applications. With its compact design and low power consumption, it can fit seamlessly into the tight space of these devices while efficiently charging the xenon photoflash.
Comparison
Advantages- Adjustable charge current limit for flexibility
- Primary-side voltage sensing eliminates the need for a resistive voltage divider
- Reduced leakage currents on the secondary side of the transformer
- Very low supply current draw extends battery life
- Integrated IGBT driver for efficient operation
- Flash dual trigger with interlock for increased noise immunity
- Optimized for mobile phone and 1-cell Li+ battery applications
- No primary-side Schottky diode needed
- Zero-voltage switching for lower loss
- High efficiency ensures effective charging
- Optional regulation feature maintains the output voltage
- Charge complete indication for convenience
- Integrated 40 V DMOS switch for reliable performanceDisadvantages- Not suitable for high power applications
- Limited to ultra-low power, small form factor cameras
- Only compatible with 1-cell Li+ batteries -
Similar parts: 2660 , Click to view
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Datasheet
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Shopping guide
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Popular parts of the same kind
- Datasheet: Download A8437ECGLT
- Chipdatas Part: CD93-A8437ECGLT
- Warehouse: China, Hong Kong
- Dispatch: Within 24 hours
- Free Shipping: Yes
- Prority Shipping: Yes, 3-5 days
- Last Updated: 2024/06/13 18:55 +0800
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- Full Refund if you don't receive your order
- Full or Partial Refund , If the item is not as described
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