PWM

MAX8772 Datasheet PDF – Quick PWM Controller

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Part Number: MAX8772

Function: Dual-Phase, Quick PWM Controller for IMVP-6+ CPU Core Power Supplies

Package: QFN 40 Pin Type ( 6mm x 6mm )

Manufacturer: Maxim Integrated

Image:
MAX8772 datasheet

Description

The MAX8770, MAX8771, MAX8772 are 2/1-phase interleaved Quick-PWM step-down VID power supply controllers for notebook CPUs. True out-of-phase operation reduces input ripple current requirements and output voltage ripple while easing component selection and layout difficulties.

The Quick-PWM control provides instanta neous response to fast load current steps. Active voltage positioning reduces power dissipation and bulk output capacitance requirements and allows ideal positioning compensation for tantalum, polymer, or ceramic bulk out put capacitors.

Pinouts:

components

Features

1. 7-Bit On-Board DAC: 0 to +1.5000V Output Adjust Range

2. Dynamic Phase Selection Optimizes Active/Sleep Efficiency

3. Transient Phase Overlap Reduces Output Capacitance

4. Integrated Boost Switches

5. Active Voltage Positioning with Adjustable Gain

6. Programmable 200kHz to 600kHz Switching Frequency

 

MAX8772 Datasheet PDF Download


MAX8772 pdf

Other data sheets are available within the file:

MAX8770GTL+, MAX8771, MAX8771GTL+, MAX8772

FAN6754 Datasheet PDF – PWM Controller – 6754MR Fairchild

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Part Number: FAN6754, 6754MR

Function: Highly Integrated Green-Mode PWM Controller

Manufacturer: Fairchild Semiconductor

Package: SOP 8 Pin Type

Image:

FAN6754 Image

 

Description

Obsolete as of 25-Nov-2012,

The highly integrated IC PWM controller provides several features to enhance the performance of flyback converters. To minimize standby power consumption, a proprietary green-mode function provides off-time modulation to continuously decrease the switching frequency under light-load conditions.

Under zero-load and very light-load conditions, The Device saves PWM pulses by entering deep burst mode. This burst mode function enables the power supply to meet international power conservation requirements.

FAN6754 integrates a frequency-hopping function internally to reduce EMI emission of a power supply with minimum line filters.Built-in synchronized slope compensation is accomplished by proprietary HV monitor to adjust VLimit for constant output power limit over universal AC input range. Also, the gate output is clamped at 13V to protect the external MOSFET from over-voltage damage.

Other protection functions include AC input brownout protection with hysteresis and VDD over-voltage protection. For over-temperature protection, an external NTC thermistor can be applied to sense the external switcher’s temperature. When VDD OVP or OTP are activated, an internal latch circuit is used to latch-off the controller. The latch mode is reset when the VDD supply is removed.

Block Diagram :

FAN6754 datasheet

Features

1. High-Voltage Startup

2. AC Input Brownout Protection with Hysteresis

3. Monitor HV to Adjust VLimit

4. Low Operating Current: 1.7mA

5. Linearly Decreasing PWM Frequency to 22KHz

6. Frequency Hopping to Reduce EMI Emission

7 Fixed PWM Frequency: 65KHz

FAN6754 Datasheet PDF Download

FAN6754 pdf

Other data sheets are available within the file:  FAN6754MLMY, FAN6754MRMY