SI8251-IQ Silicon Laboratories Inc, SI8251-IQ Datasheet

SI8251-IQ

Manufacturer Part Number

SI8251-IQ

Description

IC DIGITAL PWR CONTROLLER 32LQFP

Manufacturer

Silicon Laboratories Inc

Type

SMPS Controllerr

Datasheets

1.SI8252-IQ.pdf (32 pages)

2.SI8315-B-FS.pdf (2 pages)

Specifications of SI8251-IQ

Applications

Digital Power Controller

Voltage - Supply

2.25 V ~ 2.75 V

Current - Supply

26mA

Operating Temperature

-40°C ~ 125°C

Mounting Type

Surface Mount

Package / Case

32-LQFP

Product

MOSFET Gate Drivers

Mounting Style

SMD/SMT

For Use With

336-1323 - KIT REFERENCE DESIGN FOR SI825X

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

Voltage - Input

Lead Free Status / Rohs Status

Lead free / RoHS Compliant

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

BOSTOCK HK LIMITED

Part Number:

SI8251-IQ

Manufacturer:

Silicon Laboratories Inc

Quantity:

10 000

Company:

BOSTOCK HK LIMITED

Part Number:

SI8251-IQR

Manufacturer:

Silicon Laboratories Inc

Quantity:

10 000

Current page: 1 of 2
Download datasheet (148Kb)

The Si825x family of programmable digital power controllers

provides closed-loop feedback control, system protection and

power management functions for switch mode power systems.

The novel Si825x architecture combines a dedicated DSP-based

control loop processor with an in-system programmable system

management processor. This architecture guarantees the control

loop is updated at 10 MHz, regardless of firmware size and

complexity for the fastest possible control response. Firmware can

change all control parameters on the fly (loop gain, compensation,

timing, etc.) enabling the system to quickly and intelligently adapt

to changing operating conditions, such as loading and unloading

transients. The Si825x family is supported by a low-cost

development kit, which includes a complete real-time firmware

kernel with intuitive design tools. Packaged in a tiny 5 x 5 mm 28-

pin QFN package or 32-pin LQFP, the Si825x family provides cost-

effective control solutions that offer greater levels of performance,

controllability, reliability, and flexibility than today's analog-based

designs.

Single-Chip, Flash Digital Controller

Dedicated DSP-Based Loop Processor

Power

Supports isolated and non-isolated applications

Supports ac/dc, dc/dc and PFC applications

Enables new system capabilities

Fixed 10 MHz update rate (independent of firmware)

Differential input ADC

Loop filter DSP engine

Highly flexible DPWM with up to 6 output phases

Hardware pulse-by-pulse current limiting with programmable leading-

edge blanking

Adaptive dead-time control

Nonlinear control response

Efficiency optimization

Self diagnostics/status reporting

PID + 2nd stage low-pass filter

Selectable discrete time or SINC 2nd stage low-pass filter

Less than 5 ns dithered resolution

SYSCLKIN

VSENSE

DEBUG

PORT

VREF

VDD

IPK

VREF

OSC, and LFO

Reset Control

VSENSE

2% 25 MHz

Hardware

Interrupt

Control

Debug

VREF

DAC

10 MHz

ADC

Pulse-by-Pulse

Current Limiter

and OCP

Registers &

Detectors

ADC

Limit

Filter Engine

16/32 K

1280B

Flash

RAM

DSP

ICYC

OCP

50 MIPS Flash System Management Processor

Comprehensive, Low-cost Development Kit

Applications

5 x 5 mm 28-pin QFN and 32-pin LQFP Packages

125 °C Maximum Operating Temperature

Sequencing

Programmable hardware over-current protection

16 or 32 kB of Flash

On-board 2% oscillator

Self-sequencing, 8-channel 12-bit ADC

High-speed, programmable general-purpose comparator

PMBus hardware interface (SMBus)

Enhanced UART for isolated control data link

Four 16-bit timers

3-Channel PCA for general-purpose timing or additional PWM outputs

High-current, fully-programmable I/O port lines

Minimizes learning curve and speeds time-to-market

Real-time firmware kernel greatly reduces firmware development

Intuitive compensator design tool

GUI-based waveform designer/simulator

System configuration wizards

Intuitive IDE with real-time debug

DC/DC converters

AC/DC converters

PFC circuits

DC motor control

200 Ksps

Logic

12-bit

Auto

ADC

Flash can be used as EEPROM

Supports firmware-programmable safeguards (UVLO, OTP, OVP)

Individual hardware limit detectors with vectored interrupts

On-board temperature sensor and VREF

Standard and on-line debug modes

Everything included

u(n)

3 CH PCA

4x 16-bit

Latches

I/O Port

Timers

SMBus

VSENSE

UART

Sensor

Temp

Multiphase

DPWM

Si8250

Digital Power Controller

Gate Control (6)

Si8250/1/2

I/O (8)

4.19.2005

Related parts for SI8251-IQ

SI8251-IQ Summary of contents

Page 1

The Si825x family of programmable digital power controllers provides closed-loop feedback control, system protection and power management functions for switch mode power systems. The novel Si825x architecture combines a dedicated DSP-based control loop processor with an in-system programmable system management ...

Page 2

... IPK Sense to DPWM Output Delay System Management Processor Specifications Processor Throughput Management ADC Resolution Management ADC Sampling Frequency General Purpose Comparator Response Time Ordering Guide Part Number Flash DPWM Outputs Si8250- Si8250- Si8251- Si8251- Si8252- Si8252- Package Information (28-pin QFN) Bottom View ...

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