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PM8941 Datasheet PDF – Power Management IC – Qualcomm

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Part Number: PM8941

Function: Power Management IC.

(  found in the Samsung SHV-E330S, Samsung Galaxy Note 3 N9000 Sony L39h )

Manufacturer: Qualcomm

Image :PM8941 image

Description

This is PMIC for Peripheral LDOs, Boost Regulators.

The PM8941 device integrates all wireless handset power management, general housekeeping, and user interface support functions into a single mixed-signal IC. Its versatile design is suitable for multimode, multiband phones, and other wireless products such as data cards and PDAs.

The device mixed-signal HV-CMOS device is available in the 176-pad nanoscale package (NSP) that includes several ground pads for improved electrical ground, mechanical stability, and thermal continuity.

 

Features

1. Pulse width modulator (PWM) for dimming control of external WLED IC driver

2. Home row LED driver

3. Plug-and-play support

4. Programmable reset control

PM8941 Datasheet

PM8916 Datasheet

https://developer.qualcomm.com/qfile/29367/lm80-p0436-35_c_pm8916pm8916_power_management_ics.pdf

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D1557 Datasheet PDF – 1700V, Power NPN Transistor

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This is one of the transistor types.

Part Number: D1557, 3DD1557

Function:  Low frequency amplification bipolar transistor

Package: TO-3P(H)IS Type

Manufacturer: Jilin Sino-Microelectronics

Image

D1557 datasheet
Description

The D1557 is a high back pressure NPN bipolar power transistor, manufacturing The main technology employed: high-pressure technology mesa, triplet Diffusion of technology, the use of plastic full encapsulation structure.

Features

1. High voltage: VCBO = 1700V
2. Saturation pressure drop: VCE (sat) = 1V (max.)
3. High switching speed: tf = 0.8μS (max.)
4. High reliability
5. Environmental protection (RoHS) products

Applications: Color TV line output circuit

Pinouts:
D1557 pinout

Absolute maximum ratings

1. Collector-Base Voltage: Vcbo = 1700 V
2. Collector-Emitter Voltage: Vceo = 830 V
3. Emitter-Base Voltage: Vebo = 8 V
4. Collector Current: Ic = 10 A
5. Base Current : Ib = 5 A
6. Power Dissipation : Pc = 50 W

Reference Site:

http://monitor.espec.ws/section27/topic78212.html

 

D1557 Datasheet


 

D1557 pdf