Maxim Integrated MAX8622ETB+T
Part Number:
- MAX8622ETB+T
Manufacturer:
- Maxim Integrated
Ventron No:
- 3840151-MAX8622ETB+T
Description:
- IC XENON FLASH CHARGE 10TDFN
Datasheet:
- MAX8622ETB+T
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Part Overview
Description
The MAX8622 is a flyback switching regulator designed to quickly and efficiently charge high-voltage photoflash capacitors. It is suitable for use in digital, film, cell-phone, and smartphone cameras that utilize either 2-cell alkaline/NiMH or single-cell Li batteries. The internal low-on-resistance n-channel MOSFET enhances efficiency by reducing switch power loss.
The MAX8622 employs a current-limited, continuous-mode, transformer-switching scheme to rapidly charge the output capacitor. The cycle-by-cycle peak current-limit scheme eliminates inrush current. The current limit is programmable, allowing control over the maximum load drawn from the battery. An additional input-voltage monitor loop extends battery life by reducing the charge rate when the battery is nearing discharge. This also enables setting the current limit for a faster charge rate under typical conditions, rather than a level dictated by the worst-case discharge state of the battery.
The MAX8622 features an open-drain DONE output that indicates when the photoflash capacitor is fully charged. It automatically refreshes the output every 11 seconds, efficiently maintaining the capacitor charge level with minimal battery drain.
The MAX8622 achieves high charge accuracy through an external resistor-divider that monitors the output voltage. Sensing directly at the transformer secondary prevents output-capacitor discharge through feedback resistors while providing direct output sensing for optimal voltage accuracy that is independent of transformer turns ratio.
Features
Charges photoflash capacitors of any size
Fast charging time (2.8 seconds to charge 100uF to 300V)
No inrush current
High accuracy not dependent on transformer turns ratio
Extends battery life with input voltage monitoring
Programmable input current limit up to 1.6A
Robust architecture allows use of low-cost transformers
Automatic refresh mode
Charge-done indicator
Compact 3mm x 3mm, 10-pin TDFN package
Applications
Digital cameras
Cell-phone cameras
Film cameras
Smartphone cameras
Personal media players
The MAX8622 is a flyback switching regulator designed to quickly and efficiently charge high-voltage photoflash capacitors. It is suitable for use in digital, film, cell-phone, and smartphone cameras that utilize either 2-cell alkaline/NiMH or single-cell Li batteries. The internal low-on-resistance n-channel MOSFET enhances efficiency by reducing switch power loss.
The MAX8622 employs a current-limited, continuous-mode, transformer-switching scheme to rapidly charge the output capacitor. The cycle-by-cycle peak current-limit scheme eliminates inrush current. The current limit is programmable, allowing control over the maximum load drawn from the battery. An additional input-voltage monitor loop extends battery life by reducing the charge rate when the battery is nearing discharge. This also enables setting the current limit for a faster charge rate under typical conditions, rather than a level dictated by the worst-case discharge state of the battery.
The MAX8622 features an open-drain DONE output that indicates when the photoflash capacitor is fully charged. It automatically refreshes the output every 11 seconds, efficiently maintaining the capacitor charge level with minimal battery drain.
The MAX8622 achieves high charge accuracy through an external resistor-divider that monitors the output voltage. Sensing directly at the transformer secondary prevents output-capacitor discharge through feedback resistors while providing direct output sensing for optimal voltage accuracy that is independent of transformer turns ratio.
Features
Charges photoflash capacitors of any size
Fast charging time (2.8 seconds to charge 100uF to 300V)
No inrush current
High accuracy not dependent on transformer turns ratio
Extends battery life with input voltage monitoring
Programmable input current limit up to 1.6A
Robust architecture allows use of low-cost transformers
Automatic refresh mode
Charge-done indicator
Compact 3mm x 3mm, 10-pin TDFN package
Applications
Digital cameras
Cell-phone cameras
Film cameras
Smartphone cameras
Personal media players
Specifications
Maxim Integrated MAX8622ETB+T technical specifications, attributes, parameters and parts with similar specifications to Maxim Integrated MAX8622ETB+T.
- Mounting TypeSurface Mount
- Package / Case10-WFDFN Exposed Pad
- Supplier Device Package10-TDFN-EP (3x3)
- PackagingTape & Reel (TR)
- Part StatusObsolete
- Moisture Sensitivity Level (MSL)3 (168 Hours)
- ApplicationsPhotoflash Capacitor Charger, Xenon
- Voltage - Supply2.5V~5.5V
- RoHS StatusNon-RoHS Compliant
Certification
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