Fairchild

FAN6754MR Datasheet PDF – PWM Controller – Fairchild

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Part Number: FAN6754MR

Function: Highly Integrated Green-Mode PWM Controller

Package: SOP 8 Pin Type

Manufacturer: Fairchild Semiconductor

Image:

FAN6754MR Image

 

Description

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.

The FAN6754MR 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.

Obsolete as of 25-Nov-2012

Block Diagram :

FAN6754MR 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

8. Peak-Current-Mode Control

9. Cycle-by-Cycle Current Limiting

10. Leading-Edge Blanking (LEB)

Applications:

1. General-purpose switch-mode power supplies and flyback power converters, including:

(1) Power Adapters

 

FAN6754MR Datasheet PDF

FAN6754MR pdf

Other data sheets are available within the file:  FAN6754, FAN6754MLMY, FAN6754MRMY

6N137 Datasheet – Single-Channel Optocoupler – Fairchild

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The 6N137 is an optocoupler, also known as an opto-isolator, that is designed to transmit electrical signals between two isolated circuits.

What is optocoupler?

An optocoupler is an electronic device that is used to isolate two electrical circuits while allowing them to communicate with each other through light.

It consists of a light-emitting diode (LED) that emits light when an electric current is passed through it and a photosensitive detector that detects the light and converts it back into an electrical signal.

Optocouplers are commonly used in applications where electrical isolation is required between two circuits to prevent noise, ground loops, and other electrical interference. They can also be used to provide galvanic isolation, which is a type of electrical isolation that provides protection against electric shock and voltage spikes.

Part Number: 6N137

Function: Very high speed-10 MBit/s Logic Gate Optocoupler

Package: DIP 8 Pin Type

Manufacturer: Fairchild Semiconductor

Fairchild Semiconductor Corporation, a semiconductor manufacturing company, was acquired by ON Semiconductor Corporation on September 18, 2016.

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6n137-optocoupler

What is 6N137?

It consists of an infrared LED and a photodetector that are optically coupled, but electrically isolated. When a signal is applied to the LED, it emits an infrared light that is detected by the photodetector, which then generates an electrical signal that corresponds to the input signal.

The 6N137, HCPL-2601/2611 single-channel and HCPL-2630/2631 dual-channel optocouplers consist of a 850 nm AlGaAS LED, optically coupled to a very high speed integrated photodetector logic gate with a strobable output. This output features an open collector, thereby permitting wired OR outputs. The coupled parameters are guaranteed over the temperature range of -40°C to +85°C. A maximum input signal of 5 mA will provide a minimum output sink current of 13 mA (fan out of 8).

An internal noise shield provides superior common mode rejection of typically 10 kV/μs. The HCPL- 2601 and HCPL- 2631 has a minimum CMR of 5 kV/μs. The HCPL-2611 has a minimum CMR of 10 kV/μs.

 

Pinout

6n137-datasheet-pinout

 

Features

1. Very high speed-10 MBit/s
2. Superior CMR-10 kV/μs
3. Double working voltage-480V
4. Fan-out of 8 over -40°C to +85°C
5. Logic gate output
6. Strobable output
7. Wired OR-open collector

Applications:

1. Isolation of high-speed digital signals
2. Industrial automation
3. Medical equipment
4. Audio equipment
5. Power supply control

Parts worth reviewing : TLP521, 4N25

6N137 Datasheet PDF

6N137 pdf


 

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