BD9673EFJ-E2 datasheet, PDF - EEWORLD Datasheet

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BD9673EFJ-E2: DescriptionSwitching Voltage Regulators Step-down Sw Reg w/Built-In Power FET; CategoryPower/power management The power supply circuit; File Size2MB，26 Pages; ManufacturerROHM Semiconductor; Websitehttps://www.rohm.com/; Environmental Compliance

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BD9673EFJ-E2 Overview

Switching Voltage Regulators Step-down Sw Reg w/Built-In Power FET

BD9673EFJ-E2 Parametric

Parameter Name	Attribute value
Is it Rohs certified?	conform to
Maker	ROHM Semiconductor
Parts packaging code	TSOP
package instruction	VSOP,
Contacts	8
Reach Compliance Code	compliant
ECCN code	EAR99
Factory Lead Time	19 weeks 2 days
Other features	OUTPUT VOLTAGE RANGE FROM 1 V TO 29.4 V
Analog Integrated Circuits - Other Types	SWITCHING REGULATOR
control mode	CURRENT-MODE
Control Technology	PULSE WIDTH MODULATION
Maximum input voltage	42 V
Minimum input voltage	7 V
Nominal input voltage	24 V
JESD-30 code	R-PDSO-G8
length	4.9 mm
Number of functions	1
Number of terminals	8
Maximum operating temperature	105 °C
Minimum operating temperature	-40 °C
Nominal output voltage	5 V
Package body material	PLASTIC/EPOXY
encapsulated code	VSOP
Package shape	RECTANGULAR
Package form	SMALL OUTLINE, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)	260
Certification status	Not Qualified
Maximum seat height	1 mm
surface mount	YES
Switch configuration	BUCK
Temperature level	INDUSTRIAL
Terminal form	GULL WING
Terminal pitch	1.27 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	10
width	3.9 mm

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Datasheet

Single-chip Type with Built-in FET Switching Regulators

Flexible Step-down

Switching Regulators

with Built-in Power MOSFET

BD9673AEFJ

●General

Description

Output 1.5A and below High Efficiency Rate Step-down

Switching Regulator Power MOSFET Internal Type

BD9673AEFJ mainly used as secondary side Power

supply, for example from fixed Power supply of 12V, 24V

etc, Step-down Output of 1.2V/1.8V/3.3V/5V, etc, can be

produced. This IC has external Coil/Capacitor

down-sizing through 300kHz Frequency operation,

inside Nch-FET SW for 45V “withstand-pressure”

commutation and also, high speed load response

through Current Mode Control is a simple external

setting phase compensation system, through a wide

range external constant, a compact Power supply can

be produced easily.

●Features

■

Internal 200 mΩ Nch MOSFET

■

Output Current 1.5A

■

Oscillation Frequency 300kHz

■

Synchronizes to External Clock ( 200kHz½

500kHz )

■

Feedback Voltage 1.0V±1.0%

■

Internal Soft Start Function

■

Internal Over Current Protect Circuit,

Low Input Error Prevention Circuit,

Heat Protect Circuit

■

ON/OFF Control through EN Pin

(Standby Current 0 A Typ.)

■

Package: HTSOP-J8 Package

●Typical

Application Circuits

15µH CDRH105R

(SUMIDA)

5V/1.0A VOUT

RB056L-40 (ROHM)

47µF/15V

GRM32EB31C476KE15 (murata)

GND

BST

VCC

VCC 24V

10µF/35V

GRM31EB3YA106KA12L

(murata)

●Key

Specifications

■

Input Voltage

■

Ref. Precision (Ta=25℃)

■

Max Output Current

■

Operating Temperature

■

Max Junction Temperature

●Packages

HTSOP-J8

7V to 42V

±1.0%

1.5A (Max.)

-40℃ to 105℃

-55℃ to 150℃

4.90mm x 6.00mm x 1.00mm

HTSOP-J8

●Applications

■

For Household machines in general that have

12V/24V Lines, etc.

0.01µF

120kΩ

open

6800pF

10kΩ

ON/OFF

control

SYNC

30kΩ

Figure 1. Typical Application Circuit

○Structure：Silicon

Monolithic Integrated Circuit

○This

product is not designed for normal operation with in a radioactive.

www.rohm.com

TSZ22111・14・001

1/22

TSZ02201-0Q1Q0AJ00190-1-2

04.MAR.2014 Rev.004

BD9673AEFJ

●Description

of Blocks

Reference

This Block generates Error Amp Standard Voltage.

Standard Voltage is 1.0V.

Datasheet

REG

This is a Gate Drive Voltage Generator and 5V Low Saturation regulator for internal Circuit Power supply.

OSC

This is a precise wave Oscillation Circuit with Operation Frequency fixed to 300 kHz fixed (self-running mode).

To implement the synchronization feature connect a square wave (Hi Level: higher than 2V Low Level: lower than 0.8V )

to the SYNC pin. The synchronization frequency range is 200 kHz to 500 kHz.

After connecting the rising edge of LX will be synchronized to the falling edge of SYNC pin signal after 3 count.

At the synchronization remove the external clock, the device transitions self-running mode after 7 microseconds.

Soft Start

A Circuit that does Soft Start to the Output Voltage of DC/DC Comparator, and prevents Rush Current during Start-up.

Soft Start Time is set at IC internal, after 10ms from starting-up EN Pin, Standard Voltage comes to 1.0V, and Output

Voltage becomes set Voltage.

ERROR AMP

This is an Error amplifier what detects Output Signal, and outputs PWM Control Signal.

Internal Standard Voltage is set to 1.0V. Also, C and R are connected between the Output (VC) Pin GND of Error Amp

as Phase compensation elements. (See P.11)

ICOMP

This is a Voltage-Pulse Width Converter that controls Output Voltage in response to Input Voltage.

This compares the Voltage added to the internal SLOPE waveform in response to the FET WS Current with Error

amplifier Output Voltage, controls the width of Output Pulse and outputs to Driver.

Nch FET SW

This is an internal commutation SW that converts Coil Current of DC/DC Comparator.

It contains 45V” with stand pressure” 200mΩ SW.

Because the Current Rating of this FET is 2.0A included ripple current, please use at within 2.0A.

The device has the circuit of over current protection for protecting the FET from over current.

To detect OCP 2 times sequentially, the device will stop and after 13 msec restart.

UVLO

This is a Low Voltage Error Prevention Circuit.

This prevents internal circuit error during increase of Power supply Voltage and during decline of Power supply Voltage.

It monitors VCC Pin Voltage and internal REG Voltage, And when VCC Voltage becomes 6.4V and below, it turns OFF

all Output FET and turns OFF DC/DC Comparator Output, and Soft Start Circuit resets.

Now this Threshold has Hysteresis of 200mV.

TSD

This is a Heat Protect (Temperature Protect) Circuit.

When it detects an abnormal temperature exceeding Maximum Junction Temperature (Tj=150℃), it turns OFF all

Output FET, and turns OFF DC/DC Comparator Output. When Temperature falls, it has/with Hysteresis and

automatically returns.

10. EN

With the Voltage applied to EN Pin(6pin), IC ON/OFF can be controlled.

When a Voltage of 2.0V or more is applied, it turns ON, at Open or 0V application, it turns OFF.

About 550kΩ Pull-down Resistance is contained within the Pin.

www.rohm.com

TSZ22111・15・001

3/22

TSZ02201-0Q1Q0AJ00190-1-2

04.MAR.2014 Rev.004

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