Part Number: IT8502E

Function: Embedded Controller

Package: LQFP/QFP 128 pin

Manufacturer: ITE Tech. INC.

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Description

The IT8502E is a highly integrated embedded controller with system functions suitable for mobile system applications. The IT8502 directly interfaces to the LPC bus and provides ACPI embedded controller function, keyboard controller (KBC) and matrix scan, external flash interface for system BIOS and EC code,  PWM and ADC for hardware monitor, PS/2 interface for external keyboard/mouse devices, BRAM and system wake up functions for system power management. It also supports the external flash (or EPROM) to be shared by the host and EC side.

Features

1. 4K SRAM

2. Up to 16MB Serial Flash

3. 12 ADC Channels, 10-bit

4. 6 DAC Channels, 8-bit

5. 8 PWM Channels

6. 8502 No CIR; 8512 2 MCE CIR Ports

7. SPI Flash Read Protection

8. SPI Flash Write Protection

9. PM3 I/O Channel (62/66, 68/6C, 6A/6E)

10. Ext. WDT Can Stop After Starting

Circuits

Other data sheets are available within the file: IT8502, IT8502F, IT8502G

IT8502E Datasheet

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Part Number: SD4842P

Function : Current Mode PWM Controller With Built-in High Voltage MOSFET

Package: DIP 8 Pin Type

Manufacturer: Silan Microelectronics

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Description

The SD4842P is a current mode PWM controller with low standby power and low start current for power switch. In standby mode, the circuit enters burst mode to reduce the standby power dissipation.

The switch frequency is 67KHz with ±2.5 KHz jitter frequency for low EMI. The stress on transformer during power on is reduced by the builtin 15ms soft start circuit to avoid the saturation of transformer.

Pinout

Features

1. Lower start-up current (Typ.6μA)

2. Frequency jitter for low EMI

3. Overcurrent protection

4. Overvoltage protection

5. Undervoltage lockout

6. Built-in temperature protection

7. Built-in high voltage MOSFET

8. Built-in soft start

9. Burst mode operation

10. Cycle by cycle current limit

Applications

1. Switch power

Other data sheets are available within the file: SD4841P67K65, SD4840P, SD4842, SD4843P, SD4844P

SD4842P Datasheet PDF

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