SI9123DQ datasheet, PDF - EEWORLD Datasheet

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SI9123DQ: DescriptionIC 1 A SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PDSO16, TSSOP-16, Switching Regulator or Controller; CategoryPower/power management The power supply circuit; File Size185KB，16 Pages; ManufacturerVishay; Websitehttp://www.vishay.com

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SI9123DQ Overview

IC 1 A SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PDSO16, TSSOP-16, Switching Regulator or Controller

SI9123DQ Parametric

Parameter Name	Attribute value
Is it lead-free?	Contains lead
Is it Rohs certified?	incompatible
Parts packaging code	TSSOP
package instruction	TSSOP, TSSOP16,.25
Contacts	16
Reach Compliance Code	unknown
ECCN code	EAR99
Analog Integrated Circuits - Other Types	SWITCHING CONTROLLER
control mode	VOLTAGE-MODE
Control Technology	PULSE WIDTH MODULATION
Maximum input voltage	13.2 V
Minimum input voltage	10 V
Nominal input voltage	12 V
JESD-30 code	R-PDSO-G16
JESD-609 code	e0
length	5.075 mm
Number of functions	1
Number of terminals	16
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Maximum output current	1 A
Package body material	PLASTIC/EPOXY
encapsulated code	TSSOP
Encapsulate equivalent code	TSSOP16,.25
Package shape	RECTANGULAR
Package form	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	240
Certification status	Not Qualified
Maximum seat height	1.041 mm
surface mount	YES
Switch configuration	PUSH-PULL
Maximum switching frequency	600 kHz
Temperature level	INDUSTRIAL
Terminal surface	Tin/Lead (Sn/Pb)
Terminal form	GULL WING
Terminal pitch	0.65 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	30
width	4.4 mm
Base Number Matches	1

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Si9123

Vishay Siliconix

500-kHz Half-Bridge DC-DC Converter With

Integrated Secondary Synchronous Rectification Control

FEATURES

12-V to 72-V Input Voltage Range

Compatible with ETSI 300 132-2 100 V, 100-ms

Transients

Integrated Half-Bridge 1-A Primary Drivers

Secondary Synchronous Rectifier Control

Voltage Mode Control

Voltage Feedforward Compensation

High Voltage Pre-Regulator Operates During Start-Up

Current Sensing On Low-Side Primary Device

Hiccup Current Control During Shorted Load

Low Input Voltage Detection

Programmable Soft-Start Function

Programmable Oscillator Frequency

Over Temperature Protection

APPLICATIONS

Network Cards

Power Supply Modules

DESCRIPTION

Si9123 is a dedicated half-bridge controller IC ideally suited to

fixed telecom dc-dc converter applications where high

efficiency is required at low output voltages (e.g. <3.3 V).

Designed to operate within the voltage range of 12-72 V and

withstand 100 V, 100 ms transients, the IC is capable of

controlling and directly driving both primary side MOSFET

switches of a half-bridge circuit.

High conversion efficiency is achieved by use of synchronous

rectifying MOSFET transistors in the secondary. Due to the

very low on-resistance of the secondary MOSFETs, a

significant increase in the efficiency can be achieved as

compared with conventional Schottky diodes for today’s low

output voltages. On-chip control of the dead time delays

between the primary and secondary signals keep efficiencies

high and prevents accidental destruction of the power

transformer or wasted energy from self timed approaches.

Such a system can achieve conversion efficiencies well in

excess of 90%.

FUNCTIONAL BLOCK DIAGRAM

INEXT

EXT

BST

Voltage

Information

CS2

CS1

Half-Bridge

Synchronous

Controller

Opto

Error

Amp

1.215 V

Voltage

Control

Soft-

Start

Current

Control

PWM

Primary

Drivers

(Low)

Secondary

Drivers

SEC_SYNC

Pulse

Transformer

Driver

Logic

LOAD

Pre-Reg

BOOST

(High)

OUT

VIN1

−

Power

Transformer

Si9123

Figure 1.

Document Number: 72098

S-40692—Rev. C, 19-Apr-04

www.vishay.com

SI9123DQ Related Products

	SI9123DQ	SI9123DQ-T1	SI9123DQ-T1-E3
Description	IC 1 A SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PDSO16, TSSOP-16, Switching Regulator or Controller	IC 1 A SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PDSO16, TSSOP-16, Switching Regulator or Controller	IC 1 A SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PDSO16, LEAD FREE, TSSOP-16, Switching Regulator or Controller
Is it lead-free?	Contains lead	Contains lead	Lead free
Is it Rohs certified?	incompatible	incompatible	conform to
Parts packaging code	TSSOP	TSSOP	TSSOP
package instruction	TSSOP, TSSOP16,.25	TSSOP, TSSOP16,.25	TSSOP, TSSOP16,.25
Contacts	16	16	16
Reach Compliance Code	unknown	unknown	unknown
ECCN code	EAR99	EAR99	EAR99
Analog Integrated Circuits - Other Types	SWITCHING CONTROLLER	SWITCHING CONTROLLER	SWITCHING CONTROLLER
control mode	VOLTAGE-MODE	VOLTAGE-MODE	VOLTAGE-MODE
Control Technology	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION
Maximum input voltage	13.2 V	13.2 V	13.2 V
Minimum input voltage	10 V	10 V	10 V
Nominal input voltage	12 V	12 V	12 V
JESD-30 code	R-PDSO-G16	R-PDSO-G16	R-PDSO-G16
JESD-609 code	e0	e0	e3
length	5.075 mm	5.075 mm	5.075 mm
Number of functions	1	1	1
Number of terminals	16	16	16
Maximum operating temperature	85 °C	85 °C	85 °C
Minimum operating temperature	-40 °C	-40 °C	-40 °C
Maximum output current	1 A	1 A	1 A
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	TSSOP	TSSOP	TSSOP
Encapsulate equivalent code	TSSOP16,.25	TSSOP16,.25	TSSOP16,.25
Package shape	RECTANGULAR	RECTANGULAR	RECTANGULAR
Package form	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	240	240	250
Certification status	Not Qualified	Not Qualified	Not Qualified
Maximum seat height	1.041 mm	1.041 mm	1.041 mm
surface mount	YES	YES	YES
Switch configuration	PUSH-PULL	PUSH-PULL	PUSH-PULL
Maximum switching frequency	600 kHz	600 kHz	600 kHz
Temperature level	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL
Terminal surface	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)	Matte Tin (Sn)
Terminal form	GULL WING	GULL WING	GULL WING
Terminal pitch	0.65 mm	0.65 mm	0.65 mm
Terminal location	DUAL	DUAL	DUAL
Maximum time at peak reflow temperature	30	30	40
width	4.4 mm	4.4 mm	4.4 mm
Base Number Matches	1	1	1
Is Samacsys	-	N	N

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