Current Mode PWM Controller
The AAC142 and AAC143 are the latest in a new family of Controllers in AAIs Power Management product family. As Pin-for-Pin compatible versions of the UC2842/43, these Controllers are commonly used in a broad range of converter applications.
The AAI implementations offer the added advantages of an integrated soft-start function, 100ns current blanking function on the current sense input, and lower starting current (< 500 µA). Other standard circuit elements include a UVLO function with starting current, a precision trimmed bandgap reference voltage, insured latched switching transitions, and a PWM comparator also providing for current limit implementation.
The AAC142 is designed with UVLO threshold of 16V for turn-on and 10V for turn-off, and is targeted principally at offline applications.The AAC143 has thresholds of 8.4V for turn-on and 7.6V for turn-off, more targeted for battery level applications. Both are designed to operate with extended duty cycle capability, approaching 100%.
The AAC142 and AAC143 are part of AAIs family of Power Management products, including Controllers as well as other Feedback and Support ICs.
Features - Current Mode Controller for Power Conversion
- Pin-for-Pin to UC2842/43 Respectively
- Low Starting Current (< 500 µA)
- Integrated Soft-Start Function (~330 Clock Cycles)
- Automatic Feed Forward Compensation
- Cycle-to-Cycle Current Limit
- 100ns Current Blanking for Reduced Filtering on Current Signal
- UVLO With Hysteresis
- High Current Output
- Internally Trimmed Bandgap Reference
- 500kHz Operation
- Low Output Resistance Error Amplifier
- Extended Industrial Temp Rated (-40°C to +105°C)
Applications- Offline Power Converters
- DC/DC Converter
Ordering Information | Ordering PN(1) | Subgroup | Description | Temp. Range | Package | Packing Type | Packing Qty | | AAC142E-D8A-G-LF | Controller | Current Mode | Ext. Industrial | 8-Pin DIP | Tube | 50 | | AAC142E-S8A-G-LF | Controller | Current Mode, Offline Thresholds | Ext. Industrial | 8-Pin SOIC | Tube | 98 | | AAC142E-S8A-G-LF-TR | Controller | Current Mode, Offline Thresholds | Ext. Industrial | 8-Pin SOIC | 13” T&R (2) | 2500 | | AAC143E-D8A-G-LF | Controller | Current Mode, Battery Level Thresholds | Ext. Industrial | 8-Pin DIP | Tube | 50 | | AAC143E-S8A-G-LF | Controller | Current Mode, Battery Level Thresholds | Ext. Industrial | 8-Pin SOIC | Tube | 98 | | AAC143E-S8A-G-LF-TR | Controller | Current Mode, Battery Level Thresholds | Ext. Industrial | 8-Pin SOIC | 13” T&R (2) | 2500 |
(1) Only RoHS/Lead-Free Packaging is normally offered.
(2) T&R - Tape and Reel
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