Controller

ICE3BS02 Datasheet – SMPS Current Mode Controller – Infineon

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Part Number: ICE3BS02

Function: Off-Line SMPS Current Mode Controller with integrated 500V Startup Cell

Package: DIP, SO 8 Pin type

Manufacturer: Infineon Technologies

Images :

ICE3BS02 datasheet pdf

Description

ICE3BS02 is an off-line SMPS current-mode controller with an integrated 500V startup cell, designed for compact flyback power supplies and available in an 8-pin package.  The F3 Controller provides Active Burst Mode to reach the lowest Standby Power Requirements <100mW at no load. As the controller is always active during Active Burst Mode, there is an immediate response on load jumps without any black out in the SMPS. In Active Burst Mode the ripple of the output voltage can be reduced <1%.

Product Highlights

• Active Burst Mode to reach the lowest Standby Power Requirements < 100mW

• Protection features (Auto Restart Mode) to increase robustness and safety of the system

• Adjustable Blanking Window for high load jumps to increase system reliability

• PB-free Plating and RoHS compilant

Features

1. 500V Startup Cell switched off after Start Up

2. Active Burst Mode for lowest Standby Power @ light load controlled by Feedback Signal

3. Fast load jump response in Active Burst Mode

4. 100/67kHz internally fixed switching frequency

5. Auto Restart Mode for Overtemperature Detection

6. Auto Restart Mode for VCC Overvoltage Detection

7. Internal PWM Leading Edge Blanking

8. Soft switching for low EMI

Pinouts

ICE3BS02 Datasheet

Pin Functionality

SoftS (Soft Start & Auto Restart Control)

The SoftS pin combines the functions of Soft Start during Start Up and error detection for Auto Restart Mode. These functions are implemented and can be adjusted by means of an external capacitor at SoftS to ground. This capacitor also provides an adjustable blanking window for high load jumps,
before the IC enters into Auto Restart Mode.

FB (Feedback)

The information about the regulation is provided by the FB Pin to the internal Protection Unit and to the internal PWM Comparator to control the duty cycle. The FB-Signal controls in case of light load the Active Burst Mode of the controller.

CS (Current Sense)

The Current Sense pin senses the voltage developed on the series resistor inserted in the source of the external PowerMOS. If CS reaches the internal threshold of the Current Limit Comparator, the Driver output is immediately switched off. Furthermore the current information is provided for the PWM-Comparator to realize the Current Mode.

Gate

The Gate pin is the output of the internal driver stage connected to the Gate of an external PowerMOS.

HV (High Voltage)

The HV pin is connected to the rectified DC input voltage. It is the input for the integrated 500V Startup Cell.

VCC (Power supply)

The VCC pin is the positive supply of the IC. The operating
range is between 8.5V and 21V.

GND (Ground)

The GND pin is the ground of the controller.

Applications

  • Off-line flyback power supplies
  • AC-DC adapters
  • Low-power isolated SMPS
  • Standby power supplies
  • Auxiliary power supplies
  • Consumer electronic power supplies
  • Compact embedded power converters
  • Low-standby-power switching power supplies

Other data sheets are available within the file: ICE3AS02, ICE3AS02G, ICE3BS02G, Q67040-S4637-A101

ICE3BS02 PDF Datasheet

ICE3BS02 pdf

ICE3BS02 datasheet

BQ738 Datasheet PDF – Battery SMBus Charge Controller

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Part Number: BQ738 ( = BQ24738 )

Function : 1-4 Cell Li+ Battery SMBus Charge Controller

Package: QFN-20 Type

Manufacturer: Texas Instruments

Image

BQ738 datasheet

Description

The BQ738 device is a high-efficiency, synchronous battery charger, offering low component count for space-constrained, multichemistry battery charging applications. The BQ738 device supports turbo boost by allowing battery discharge energy to the system when system power demand is temporarily higher than the adapter maximum power level so the adapter will not crash.

Pinout

BQ738 pinout BQ24738

Features

1. Adapter and Battery Provide Power to System Together to Support Intel CPU Turbo Boost Mode

2. SMBus Host-Controlled NMOS-NMOS Synchronous Buck Converter With Programmable 615-, 750-, and 885-kHz Switching Frequencies

3. Programmable Battery Depletion Threshold, and Battery LEARN Function

4. Programmable Adapter Detection and Indicator

5. Integrated Loop Compensation and Soft Start

Applications

1. Portable Notebook Computers, UMPC, Ultra-Thin Notebooks, and Netbooks

2. Handheld Terminals

3. Portable Equipment

4. Industrial and Medical Equipment

Design Considerations

  • Select external MOSFETs with appropriate RDS(on) and current rating for charger efficiency.
  • Inductor value must be chosen based on switching frequency and desired ripple current.
  • Proper layout of high-current switching paths is critical to minimize EMI and losses.
  • Use SMBus interface to configure charging voltage, current limits, and system power management.
  • Thermal management of MOSFETs and inductor should be considered in compact notebook designs.

Selection Guidance

  • Recommended when SMBus-controlled smart charging is required.
  • Suitable for systems needing adapter and battery power sharing.
  • Useful in designs where high transient CPU loads must be supported.
  • Appropriate for compact designs requiring low external component count.
  • Compatible with multichemistry rechargeable battery systems.

Other data sheets are available within the file: BQ24738

BQ738 Datasheet

BQ738 pdf

BQ735 Datasheet

BQ735 pdf