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Part Name(s) : SG3524S
Linear
Linear Technology
Description : Regulating PULSE WIDTH MODULATOR

Regulating PULSE WIDTH MODULATOR

Part Name(s) : M66244FP
Mitsubishi
MITSUBISHI ELECTRIC
Description : High Speed Monolithic PULSE WIDTH MODULATOR

DESCRIPTION
The M66244FP is a high-speed digitally programmable PULSE WIDTH MODULATOR (PWM) which uses high-performance silicon gate CMOS process technology.Output PULSE WIDTH is proportional to a 6-bit DATA input value. Two additional CONTROL inputs determine if the PULSE is placed at the beginning , middle ,or end of the clock period. PULSE WIDTH and placement can be changed every clock cycle up to 72MHz.

FEATURES
• Frequency 45MHz to 72MHz
• 6 bit Resolution
• Center, Leading, Trailing Edge Modulation
• Single 3.3V Operation
• JTAG (IEEE Standard 1149.1Test Port)

APPLICATIONS
• Laser Printers
   Gray Scale Capability
   Resolution Enhancement
• Copiers
• Optical Disk Drives
• Precision PULSE Placement

Part Name(s) : NTE1722
NTE-Electronic
NTE Electronics
Description : PULSE WIDTH MODULATOR (PWM) Control Circuit

Description:

The NTE1722 is a high performance PULSE WIDTH MODULATOR integrated circuit in an 18–Lead DIP type package intended for fixed frequency switching regulators and other power control applications. Functions included in this IC are a temperature compensated voltage reference, sawtooth oscillator, error amplifier, PULSE WIDTH MODULATOR, PULSE metering and steering logic, and two high current totem pole outputs ideally suited for driving the capacitance of power FETs at high speeds.



Features

8.0 to 35 Volt Operation

5.0 Volt ±1% Trimmed Reference

1.0Hz to 400kHz Oscillator Range

Dual Source/Sink Current Outputs: ±100mA

Digital Current Limiting

Programmable Dead Time

Wide Current Limit Common Mode Range

Guaranteed 6 Unit Synchronization


Motorola
Motorola => Freescale
Description : PRECISION SWITCHMODE PULSE WIDTH MODULATOR CONTROL CIRCUIT

PRECISION SWITCHMODE PULSE WIDTH MODULATOR CONTROL CIRCUIT



The MC34060A is a low cost fixed frequency, PULSE WIDTH modulation control circuit designed primarily for single–ended SWITCHMODE power supply control.

The MC34060A is specified over the commercial operating temperature range of 0°to +70°C, and the MC33060A is specified over an automotive temperature range of –40°to +85°C.



•Complete PULSE WIDTH Modulation Control Circuitry

•On–Chip Oscillator with Master or Slave Operation

•On–Chip Error Amplifiers

•On–Chip 5.0 V Reference, 1.5% Accuracy

•Adjustable Dead–Time Control

•Uncommitted Output Transistor Rated to 200 mA Source or Sink

•Undervoltage Lockout


Dallas
Dallas Semiconductor -> Maxim Integrated
Description : 5-Bit, Programmable, 100kHz PULSE-WIDTH MODULATOR

DESCRIPTION
The DS1052 is a programmable, 5-bit, PULSE-WIDTH MODULATOR featuring a 2-wire addressable controlled interface. The DS1052 operates from power supplies ranging from 2.7V up to 5.5V. The PWM output provides a signal that swings from 0V to VCC.
The DS1052-100 requires a typical operating current of 100µA and a programmable shutdown supply current of 1µA.

FEATURES
◾ Single 5-bit, programmable, PULSE-WIDTH MODULATOR (PWM)
◾ Adjustable Duty Cycle: 0% to 100%
◾ 2.7V to 5.5V Operation
◾ Standard Frequency Value: 100kHz
◾ 2-Wire Addressable Interface
◾ Packages: 8-Pin (150-mil) SOIC and 8-Pin (118-mil) μSOP
◾ Operating Temperature: -40°C to +85°C

Motorola
Motorola => Freescale
Description : PULSE WIDTH MODULATOR CONTROL CIRCUITS

PULSE WIDTH MODULATOR Control Circuits

The SG3525A, SG3527A PULSE WIDTH MODULATOR control circuits offer improved performance and lower external parts count when implemented for controlling all types of switching power supplies. The on–chip +5.1 V reference is trimmed to ±1% and the error amplifier has an input common–mode voltage range that includes the reference voltage, thus eliminating the need for external divider resistors. A sync input to the oscillator enables multiple units to be slaved or a single unit to be synchronized to an external system clock. A wide range of deadtime can be programmed by a single resistor connected between the CT and Discharge pins. These devices also feature built–in soft–start circuitry, requiring only an external timing capacitor. A shutdown pin controls both the soft–start circuitry and the output stages, providing instantaneous turn off through the PWM latch with PULSEd shutdown, as well as soft–start recycle with longer shutdown commands. The under voltage lockout inhibits the outputs and the changing of the soft–start capacitor when VCC is below nominal. The output stages are totem–pole design capable of sinking and sourcing in excess of 200 mA. The output stage of the SG3525A features NOR logic resulting in a low output for an off–state while the SG3527A utilized OR logic which gives a high output when off.

• 8.0 V to 35 V Operation
• 5.1 V ± 1.0% Trimmed Reference
• 100 Hz to 400 kHz Oscillator Range
• Separate Oscillator Sync Pin
• Adjustable Deadtime Control
• Input Undervoltage Lockout
• Latching PWM to Prevent Multiple PULSEs
PULSE–by–PULSE Shutdown
• Dual Source/Sink Outputs: ±400 mA Peak

Part Name(s) : NTE1721 NTE1723
NTE-Electronic
NTE Electronics
Description : Integrated Circuit PULSE WIDTH MODULATOR (PWM) Regulator

Description:

The NTE1721 and NTE1723 are PULSE WIDTH MODULATOR control–circuits designed to offer improved performance and lowered external parts count when implemented for controlling all types of switching power supplies. The no–chip +5.1V reference is trimmed to ±1% and the input common–mode range of the errror amplifier includes the reference voltage, thus eliminating the need for external divider resistors. A sync input to the oscillator enables multiple units to be slaved or a single unit to be synchronized to an external system clock. A wide range of dead time can be programmed by a single resistor connected between the CT and the Discharge pins. These devices also feature a built–in soft–start circuitry, requiring only an external timing capacitor.



Features:

• 8V to 35V Operation

• +5.1V ±1% Trimmed Reference

• 100Hz to 400kHz Oscillator Range

• Separate Oscillator Sync Pin

• Adjustable Dead Time Control

• Input Undervoltage Lockout

• Latching PWM to Prevent Multiple PULSEs

PULSE–by–PULSE Shutdown

• Dual Source/Sink Outputs: ±400mA Peak



 


Part Name(s) : NTE1729
NTE-Electronic
NTE Electronics
Description : Integrated Circuit PULSE WIDTH MODULATOR (PWM) Control Circuit

Description:

The NTE1729 is an inverter control unit in a 16–Lead DIP type package which provides all the control circuitry for PWM type switching regulators. Included in this device is the voltage reference, dual error amplifiers, oscillator, PULSE WIDTH MODULATOR, PULSE steering flip flop, dual alternating output switches, and dead time control.



Features:

■ Complete PWM Power Control Circuit

■ Adjustable Dead Time: 0 to 100%

■ No Double Pulsing of Same Output during Load Transient Condition

■ Dual Error Amplifiers have Wide Common Mode Input Voltage Capability: –0.3V to VCC –2V

■ Circuit Architecture Provides Easy Synchronization

■ Uncommitted Outputs for 250mA Sink or Source

■ With Miss–Operation Prevention Circuit for Low Level Supply Voltage



 


Part Name(s) : NTE1720
NTE-Electronic
NTE Electronics
Description : Integrated Circuit PULSE WIDTH MODULATOR (PWM) Regulator

Description:

The NTE1720 PWM switching regulator control circuit contains all the essential circuitry to implement single–ended or push–pull switching regulators. Included on the circuit are oscillator, voltage refer ence, a PULSE WIDTH MODULATOR, error amplifier, overload protection circuitry and output drivers.

A substance zener reference has been used to provide excellent stability with time and the reference has been used to provide excellent stability with time and the reference is trimmed at the wafer level to provide an initial accuracy of 2%. Additionally, the oscillator is trimmed to provide a medium toler ance of 6%.



Features:

• Reference Tolerance: ±2%

• Oscillator Tolerance: ±6%

• Long Term Stability: 10mV/1000 Hrs

• Operates Above 100kHz



Applications:

• Switching Power Supplies

• Motor Speed Control

• Off–Line Power Converters



 


Intersil
Intersil
Description : CMOS Serial Digital PULSE WIDTH MODULATOR

Description
The CDP68HC68W1 modulates a clock input to supply a variable frequency and duty-cycle output signal. Three 8-bit registers (PULSE WIDTH, frequency and control) are accessed serially after power is applied to initialize device operation. The value in the PULSE WIDTH register selects the high duration of the output period. The frequency register byte divides the clock input frequency and determines the overall output clock period. The input clock can be further divided by two or a low power mode may be selected by the lower two bits in the control register. A comparator circuit allows threshold control by setting the output low if the input at the VT pin rises above 0.75V. The CDP68HC68W1 is supplied in an 8 lead PDIP package (E suffix).

Features
• Programmable Frequency and Duty Cycle Output
• Serial Bus Input; Compatible with Motorola/Intersil SPI Bus, Simple Shift-Register Type Interface
• 8 Lead PDIP Package
• Schmitt Trigger Clock Input
• 4V to 6V Operation, -40oC to 85oC Temperature Range
• 8MHz Clock Input Frequency

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