Part Number: SH69P26

Function: OTP 6K 4-Bit Micro-Controller

Package: SOP 28 Pin, DIP 32 Pin Type

Manufacturer: Sino Wealth

Images:

 

Description

The SH69P26 is a single-chip 4-bit micro-controller. This device integrates a SH6610D CPU core, 6K words of OTPROM, 389 nibbles of RAM, two 8-bit timer/counter and one 16-bit timer / counter, comparator, two channel tone generators, on-chip oscillator clock circuitry, on-chip watchdog timer, low voltage reset function. The SH69P26 is suitable for microwave oven
application.

Features

1. SH6610D-based single-chip 4-bit micro-controller

2. OTPROM: 6k X 16 bits

3. RAM: 389 X 4 bits
(1) 69 System control register
(2) 320 Data memory

4. Operation voltage:
(1) fOSC = 30kHz – 4MHz, VDD = 2.4V – 5.5V
(2) fOSC = 4MHz – 8MHz, VDD = 4.5V – 5.5V

5. 29 CMOS bi-directional I/O pins

6. 8-level stack (including interrupts)

7. Two 8-bit auto re-loaded timer/counter, one can switch to external clock source

8. Warm-up timer

9. Built-in pull-high for I/O port

Pinouts:

SH69P26 PDF Datasheet

Part Number: OB2268

Function: Current Mode PWM Controller

Package: SOP-8 and DIP-8 Type

Manufacturer: Liteon

Images:

Description

 

OB2268 is a highly integrated current mode PWM control IC optimized for high performance, low standby power and cost effective offline flyback converter applications in above 20W power level. PWM switching frequency at normal operation is externally programmable and trimmed to tight range. At no load or light load condition, the IC operates in extended ‘burst mode’ to minimize switching loss. Lower standby power and higher conversion efficiency is thus achieved. VDD low startup current and low operating current contribute to a reliable power on startup design with OB2268/9. A large value resistor could thus be used in the startup circuit to minimize the standby power. The internal slope compensation improves system large signal stability and reduces the possible subharmonic oscillation at high PWM duty cycle output. Leading-edge blanking on current sense input removes the signal glitch due to snubber circuit diode reverse recovery. and greatly reduces the external component count and system cost in the design. OB2268/9 offers complete protection coverage with automatic self-recovery feature including Cycle-byCycle current limiting (OCP), over load protection (OLP), over temperature protection (OTP), VDD over voltage protection (OVP) and under voltage lockout (UVLO). The Gate-drive output is clamped to maximum 18V to protect the power MOSFET. Excellent EMI performance is achieved with OnBright proprietary frequency shuffling technique (OB2269 only) together with soft switching control at the totem pole gate drive output. The tone energy at below 20KHZ is minimized in operation. Consequently, audio noise performance is greatly improved.

Features:

■ Extended Burst Mode Control For Improved Efficiency and Minimum Standby Power Design ■ Audio Noise Free Operation ■ External Programmable PWM Switching Frequency ■ Internal Synchronized Slope Compensation ■ Low VIN/VDD Startup Current(4uA) and Low Operating Current (2.3mA) ■ Leading Edge Blanking on Current Sense Input ■ Complete Protection Coverage With Auto SelfRecovery o External Programmable Over Temperature Protection (OTP) o With or Without On-chip VDD OVP for Output Over Voltage Protection. o Under Voltage Lockout with Hysteresis (UVLO) o Gate Output Maximum Voltage Clamp (18V) o Line Compensated Cycle-by-Cycle Overcurrent Threshold Setting For Constant Output Current Limiting Over Universal Input Voltage Range (OCP) o Over Load Protection. (OLP) ■ On-Bright Proprietary Frequency Shuffling Technology for Improved EMI Performance (OB2269 only) ■ Applications Offline AC/DC flyback converter for ■ Laptop Power Adaptor ■ PC/TV/Set-Top Box Power Supplies ■ Open-frame SMPS ■ Battery Charger  […]

Applications:

■ Laptop Power Adaptor
■ PC/TV/Set-Top Box Power Supplies
■ Open-frame SMPS
■ Battery Charger

OB2268 PDF Datasheet