Datasheet

TLP651 Datasheet PDF – Photocoupler, DIP 8 – Toshiba

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Part Number: TLP651

Function: Photocoupler GaA-As IRed & Photo−IC

Package: 11-10C4, DIP 8

Manufacturer: Toshiba

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TLP651 datasheet

Description

TLP651 is a high-speed optocoupler from Toshiba that integrates an infrared LED and a photodiode-transistor detector in an 8-pin DIP package with 5000Vrms isolation capability. It provides fast switching performance with TTL-compatible output and includes an accessible base pin for improved analog operation and noise control. This device is widely used for signal isolation in digital logic, power supplies, and microprocessor interface circuits.

Features

  • High isolation voltage of 5000Vrms minimum
  • High-speed switching (tpHL ≈ 0.3µs, tpLH ≈ 0.5µs)
  • TTL-compatible output characteristics
  • Integrated photodiode-transistor detector
  • Base pin access for analog control and noise reduction
  • UL1577 and cUL certified isolation device
  • 8-pin DIP package for through-hole mounting

Pinout

TLP651 pinout

Design Notes

  • Use the base pin connection to stabilize operation in analog or high-noise environments
  • Keep input LED drive current within recommended limits to ensure long-term reliability
  • Maintain proper creepage and clearance distances to preserve isolation performance
  • Decouple supply lines to reduce switching noise coupling into output stages
  • Select pull-up resistor values carefully to balance speed and power consumption

Typical Circuit Usage

  • Digital signal isolation between logic domains
  • Switching power supply feedback loops
  • Microprocessor and MCU interface isolation
  • Line receiver and communication isolation circuits

How to Choose This Part

  • Select for high-speed optocoupling with TTL-compatible outputs
  • Suitable for designs requiring high isolation voltage (5kVrms)
  • Use when analog control via base pin is beneficial
  • Consider TLP650 variant if base pin is not required

Applications

  • Digital logic ground isolation
  • Switching power supply control systems
  • Industrial control interfaces
  • Signal isolation in embedded systems

Alternative / Equivalent Products

  • TLP650 (no base pin version)
  • HCPL-2630
  • 6N137
  • ACPL-2631

 

TLP651 Datasheet PDF Download


TLP651 pdf

Other data sheets are available within the file:  TL-P651

uP9512R Datasheet – PWM Controller

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Part Number: uP9512R

Function: Phase Synchronous-Rectified Buck Controller

Package: VQFN5x5-40L package

Manufacturer: uPI Semiconductor( www.upi-semi.com )

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uP9512R datasheet controller

Description

The uP9512R is an 8/7/6/5/4/3/2/1-phase PWM controller specifically designed to provide high-precision output voltage system for next generation GPUs. The uP9512R provides programmable output voltage and active voltage positioning functions to adjust the output voltage as a function of the load current, so it is optimally positioned for  a load current transient.

Features

1. Support up to 2MHz Operation Frequency

2. Continuous Inductor DCR Current Sensing

3. Auto-Phase Shedding

4. Adjustable Soft-Start Time

5. Power State Input (PSI)

6. Power Good Indication

7. Channel Current Limit Protection

8. Total Output Over Current Protection

9.  Over/Under Voltage Protection

10. Over Temperature Protection

 

Pinout

uP9512R pinout pwm

 

Applications

1. Desktop/Server CPU Power Supply (Core VRM)

(1) uP9512R is suitable for CPU core power supply of Intel and AMD platforms.

(2) As a multi-phase synchronous buck controller for multi-core CPUs requiring high current and fast response, current distribution and efficient power supply are possible

(3) Example: High-end CPU power supply such as Intel LGA1700, LGA1200, AMD AM5, TR4

2. GPU power supply (Vcore and Memory Power)

(1) Can be used as Vcore and GDDR memory power supply of NVIDIA and AMD GPUs

(2) Especially adopted in many Power Delivery designs of board partner (AIB) graphics cards

(3) High switching frequency, fast DVID response performance is required

3. FPGA / ASIC / AI Accelerator board power supply

(1) Used as power supply of Xilinx, Intel FPGA, or AI computing SoC (e.g. Google TPU, NVIDIA Grace, etc.)

(2) Suitable for applications where load transient characteristics are important

4. Mainboard power supply for server / data center

(1) Adjust multiple power rails such as CPU, VCCIN, VDDR on server class mainboards

(2) Supports VR13 (Intel), SVID interface → Used as a server controller

(3) High-end motherboard CPU VCore ( ASUS ROG, MSI, GIGABYTE, NVIDIA RTX graphics card )

uP9512R Datasheet

uP9512R pdf