Part Number: MAX774CPA

Function: -15V or adjustable, high-efficiency, low IQ inverting DC-DC controller

Package: DIP, SO 8 Pin Type

Manufacturer: Maxim Integrated

Pinouts:

 

Description

The MAX774CPA, MAX775, MAX776 inverting switching regulators deliver high efficiency over three decades of load current.

A unique current-limited, pulse frequency modulated (PFM) control scheme provides the benefits of pulse-width modulation (high efficiency with heavy loads), while using less than 100µA of supply current (vs. 2mA to 10mA for PWM converters).

The result is high efficiency over a wide range of loads.

 

Features

1. 85% Efficiency for 5mA to 1A Load Currents

2. Up to 5W Output Power

3. 100μA Max Supply Current

4. 5μA Max Shutdown Current

5. 3V to 16.5V Input Range

6. Current-Limited PFM Control Scheme

7. 300kHz Switching Frequency

 

MAX774CPA Datasheet PDF Download

Other data sheets are available within the file:

MAX774, MAX774C/D, MAX774CSA, MAX774EPA

Part Number: UCC28061-Q1

Function: Natural Interleaving Transition-Mode PFC Controller With Improved Audible Noise Immunity

Package: SOIC 16 Pin Type

Manufacturer: Texas Instruments

Pinouts:

 

Description

Optimized for consumer applications concerned with audible noise elimination, this solution extends the advantages of transition mode—high efficiency with low-cost components—to higher power ratings than previously possible. By utilizing a Natural Interleaving technique, both channels operate as masters (that is, there is no slave channel) synchronized to the same frequency. This approach delivers inherently strong matching, faster responses, and ensures that each channel operates in transition mode.

Features

• Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results
– Device Temperature Grade 1: -40°C to +125°C Ambient Operating Temperature Range
– Device HBM ESD Classification Level H2
– Device CDM ESD Classification Level C3B
• Easy Phase Management Facilitates Compliance to Light-Load Efficient Standards
• FailSafe OVP with Dual Paths Prevents Outpu Over-Voltage Conditions Caused by Voltage-Sensing Failures
• Sensorless Current Shaping Simplifies Board Layout and Improves Efficiency
• Inrush Safe Current Limiting:
– Prevents MOSFET conduction during inrush
– Eliminates reverse recovery events in output rectifiers

SYSTEM Features

• Improved Audible Noise Performance
• Soft Start on Overvoltage
• Integrated Brownout
• Improved Efficiency and Design Flexibility over Traditional, Single-Phase Continuous
Conduction Mode (CCM)
• Input Filter and Output Capacitor Current Cancellation :
– Reduced current ripple for higher system reliability and smaller bulk capacitor
– Reduced EMI filter size
• Enables Use of Low-Cost Diodes withoutExtensive Snubber Circuitry
• Improved Light-Load Efficiency
• Improved Transient Response
• Complete System-Level Protection
• 1-A Source/1.8-A Sink Gate Drivers

Applications

• 100-W to 800-W Power Supplies
• E-bike
• Automotive Applications

Other data sheets are available within the file: UCC28061-Q1, UCC28061Q, UCC28061, UCC28061Q1

 

UCC28061-Q1 Datasheet PDF Download