AP22655

Description

The AP22654 and AP22655 are single channel precision adjustable current-limit switches optimized for applications that require precision current limiting, or to provide up to 3.1A of continuous load current during heavy loads/short circuits. These devices offer a pin-strapped current-limit threshold between 0.4A and 3.56A (typ) via an external resistor. Current limit accuracy ±12% can be achieved at high current limit settings. The rise and fall times are controlled to minimize current surges during turn on/off.

The devices have fast short-circuit response time for improved overall system robustness. They provide a complete protection solution for applications subject to heavy capacitive loads and the prospect of short circuit, offering reverse current blocking and limiting, overcurrent, overtemperature and short-circuit protections, as well as controlled rise time and undervoltage lockout functionality. A 7ms deglitch capability on the open-drain Flag output prevents false overcurrent reporting and does not require any external components.

AP22654 and AP22655 limit the output current to a safe level when the output current exceeds current-limit threshold.

Both devices are available in TSOT26 (Type A1) package.  

Feature(s)

• Up to 3.1A Maximum Load Current
• Accurate Adjustable Current Limit, 0.4A to 3.56A
• ±12% Accurate Adjustable Current Limit, 1.0A with R_LIM = 6.8kΩ
• Constant Current During Overcurrent
• Fast Short-Circuit Response Time: 5µs (typ)
• Reverse Current Blocking During Shutdown and Reverse Current Limiting During Enable
• Operating Range: 3.0V to 5.5V
• Built-in Soft-Start with 1.0ms Typical Rise Time
• Overcurrent, Reverse Output Current/Voltage and Thermal Protection
• Fault Report (FAULT) with Blanking Time
• ESD Protection: 2kV HBM, 1.5kV CDM
• Active Low (AP22654) or Active High (AP22655) Enabled
• TSOT26 (Type A1) Package: Available in “Green” Molding Compound (No Br, Sb)
• 15kV ESD Protection per IEC 61000-4-2 (With Ext. Capacitance)
• UL Recognized, File Number E322375, Vol. 1
• IEC62368-1 CB Scheme Certified
• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
• Halogen and Antimony Free. “Green” Device (Note 3)
• For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/

Application(s)

• Notebook PCs/laptops
• Desktops
• Residential gateways
• LCD TVs/monitors
• Docking stations
• USB hubs
• Set-top boxes
• Servers