BD9244AFV-E2 datasheet, PDF - EEWORLD Datasheet

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BD9244AFV-E2: DescriptionSwitching Regulator/Controller, Voltage-mode, 110kHz Switching Freq-Max, PDSO24; CategoryPower/power management The power supply circuit; File Size185KB，5 Pages; ManufacturerROHM Semiconductor; Websitehttps://www.rohm.com/; Environmental Compliance

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BD9244AFV-E2 Overview

Switching Regulator/Controller, Voltage-mode, 110kHz Switching Freq-Max, PDSO24

BD9244AFV-E2 Parametric

Parameter Name	Attribute value
Is it Rohs certified?	conform to
Maker	ROHM Semiconductor
package instruction	TSSOP, TSSOP24,.3
Reach Compliance Code	compliant
control mode	VOLTAGE-MODE
JESD-30 code	R-PDSO-G24
Number of terminals	24
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package body material	PLASTIC/EPOXY
encapsulated code	TSSOP
Encapsulate equivalent code	TSSOP24,.3
Package shape	RECTANGULAR
Package form	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Certification status	Not Qualified
surface mount	YES
Maximum switching frequency	110 kHz
Temperature level	INDUSTRIAL
Terminal form	GULL WING
Terminal pitch	0.635 mm
Terminal location	DUAL

BD9244AFV-E2 Preview

1/4

STRUCTURE

Silicon Monolithic Integrated Circuit

NAME OF PRODUCT

DC-AC Inverter Control IC

TYPE

FUNCTION

ＢＤ９２４４ＡＦＶ

・

36V High voltage process

1ch control with Full-Bridge

Lamp current and voltage sense feed back control

Sequencing easily achieved with Soft Start Control

Short circuit protection with Timer Latch

Under Voltage Lock Out and Over Voltage Protection

Mode-selectable the operating or stand-by mode by stand-by pin

BURST mode controlled by PWM and DC input

○Absolute Maximum Ratings（Ｔ½＝２５℃）

Parameter

Supply Voltage

BST PIN

SW PIN

BST-SW voltage difference

Operating Temperature Range

Storage Temperature Range

Maximum Junction Temperature

Power Dissipation

Symbol

VCC

BST

BST-SW

Topr

Tstg

Tjmax

Limits

-40½+85

-55½+150

+150

1024*

Unit

℃

Pd derate at 5.6mW/℃ for temperature above Ta = 25℃ (When mounted on a PCB 70.0mm×70.0mm×1.6mm)

〇Operating condition

Parameter

Supply voltage

BST voltage

BST-SW voltage difference

oscillation frequency

BCT oscillation frequency

Symbol

VCC

BST

BST-SW

FOUT

fBCT

Limits

9.0½30.0

5.0½37.5

5.0½14.0

30½110

0.05½1.00

Unit

kHz

REV. A

2/4

○Electric Characteristics（Ta=25℃、VCC=24V、STB=3.0V）

Parameter

（

（WHOLE DEVICE）

）

Operating current

Stand-by current

（

（STAND BY CONTROL）

）

Stand-by voltage H

Stand-by voltage L

（

（VCC UVLO BLOCK）

）

Operating voltage (VCC)

Hesteresis width (VCC UVLO)

Operating voltage (UVLO)

Hesteresis width(UVLO)

Operating voltage (OVP)

Hesteresis width(OVP)

（

（REG BLOCK）

）

REG output voltage

REG source current

（

（OSC BLOCK）

RT Output Voltage

SRT ON Resistor value

（

（SOFT START BLOCK）

）

Soft start time

（

（BOSC BLOCK）

）

BOSC Max voltage

BOSC Min voltage

BOSC frequency

（

（FEED BACK BLOCK）

）

IS threshold voltage

VS threshold voltage

IS source current 1

IS source current 2

VS source current

IS COMP detect voltage

（

（OUTPUT BLOCK）

）

LN output sink resistance

LN output source resistance

HN output sink resistance

HN output source resistance

MAX DUTY

OFF period

Drive output frequency

（

（TIMER

LATCH BLOCK）

VCP

ICP

RFAIL

VIS1

VVS

IIS1

IIS2

IVS

VBCTH

VBCTL

FBCT

TSS

VRT

RSRT

VREG

IREG

VstH

VstL

Icc1

Icc2

Symbol

MIN.

Limits

TYP.

MAX.

Unit

Conditions

－

2.2

5.0

μA

FOUT=60kHz, FB=SW=GND, BST=OPEN

2.0

-0.3

－

VCC

1.0

System

ＯＮ

System

ＯＦＦ

V_VCCUVP

⊿V_VCCUVP

V_UVP

⊿V_UVP

V_OVP

⊿V_OVP

6.17

0.37

1.80

0.15

3.10

0.15

6.50

0.50

1.85

0.20

3.20

0.20

6.83

0.63

1.90

0.25

3.30

0.25

7.35

7.50

－

7.65

－

VCC>8.5V

1.05

－

1.50

100

1.95

200

2.5

5.0

10.0

FOUT=60kHz

2.16

0.6

291

2.25

0.7

300

2.34

0.8

309

fBCT=0.3kHz

BCT=10000pF

1.225

1.215

－

0.606

1.250

－

0.625

1.275

1.285

0.9

0.644

μA

DUTY=2.45V

DUTY=0V IS=1.0V

VISCOMP

RsinkLN

RsourceLN

RsinkHN

RsourceHN

MAX DUTY

TOFF

FOUT

1.5

46.0

100

57.9

48.5

200

49.5

400

62.1

kHz

RT=100kΩ

VBST-VSW=7.0V

FOUT=60kHz

CP timer latch detect voltage

CP timer latch charge current

FAIL ON Resistor value

（

（COMP BLOCK）

）

COMP over voltage detect voltage

Hysteresis width （COMP）

1.9

0.85

－

2.0

1.0

125

2.1

1.15

250

μA

VCOMP

⊿VCOMP

3.88

0.15

4.0

0.20

4.12

0.25

(

This product is not designed to be radiation-resistant.

)

REV. A

3/4

〇Package Dimensions

〇Block Diagram

VCC

REG

BCT

DUTY

DEVICE MARK

REG

BLOCK

OSC

BLOCK

BOSC

BLOCK

DUTY

BLOCK

STB

BLOCK

SYSTEM　ON/OFF

REG

BD9244AFV

BST1

HN1

SW1

F/B

BLOCK

PWM

BLOCK

LOGIC

BLOCK

OUTPUT

BLOCK

LN1

BST2

BLOCK

CT_COUNTER

PROTECT

BLOCK

HN2

SW2

LN2

Lot No.

GND

PGND

VCC

VLO

ブロック

COMP

SRT

VLO

FAIL

SSOP-B24 (UNIT:mm)

○Pin Description

PIN NAME

No.

FUNCTION

No.

PIN NAME

FUNCTION

PGND

Power Ground for FET drivers

FAIL

Error Indication signal output ( Normal : L, Error : OPEN)

LN2

NMOS FET driver (Ch. 2)

External capacitor between CP and GND for timer latch

BST2

Boot-strap input for HN2 output

NMOS FET driver (Ch. 2)

Error amplifier output

HN2

Error amplifier input 2

SW2

Lower rail voltage for HN2 output

Error amplifier input 1

VCC

Power supply input with UVLO Protection

COMP

Input of over voltage detector

STB

Stand-by switch

External resister from SRT to RT for adjusting the start-up

VLO

External Under Voltage Lock Out and Over Voltage Protection

SRT

Triangle oscilator

External resistor between RT and GND for adjustment

SW1

Lower rail voltage for HN1 output

frequency of saw tooth wave

HN1

NMOS FET driver (Ch. 1)

GND

Ground

External capacitor between BCT and GND for adjusting

BST1

Boot-strap input for HN1 output

BCT

the BURST triangle oscillator

REG

regulator output

DUTY

Control Burst-dimming by PWM signal or DC

LN1

NMOS FET driver (Ch. 1)

REV. A

4/4

〇NOTE FOR USE

１. When designing the external circuit, including adequate margins for variation between external devices and IC. Use adequate

margins for steady state and transient characteristics.

２. The circuit functionality is guaranteed within of ambient temperature operation range as long as it is within recommended

operating range. The standard electrical characteristic values cannot be guaranteed at other voltages in the operating ranges,

however the variation will be small.

３. Mounting failures, such as misdirection or miscounts, may harm the device.

４. A strong electromagnetic field may cause the IC to malfunction.

５. The GND pin should be the location within ±0.3V compared with the PGND pin.

６. If the voltage between VCC and I/O pins or GND and I/O pins is in opposite from the normal potential difference, unusual

current flow into pins may occur which can destroy the IC. To avoid such occurrence it is recommended to place protection

diodes for prevention against backward current flow.

７. BD9244AFV incorporate a built-in thermal shutdown circuit (TSD circuit). The thermal shutdown circuit (TSD circuit) is

designed only to shut the IC off to prevent runaway thermal operation. It is not designed to protect the IC or guarantee

its operation of the thermal shutdown circuit is assumed.

８. Absolute maximum ratings are those values that, if exceeded, may cause the life of a device to become significantly shortened.

Moreover, the exact failure mode caused by short or open is not defined. Physical countermeasures, such as a fuse, need

to be considered when using a device beyond its maximum ratings.

９. About the external FET, the parasitic Capacitor may cause the gate voltage to change, when the drain voltage is switching.

Make sure to leave adequate margin for this IC variation.

１０. By STB voltage, BD9244AFV are changed to 2 states. Therefore, do not input STB pin voltage between one state and the other

state (1.0½2.0V).

１１. The pin connected a connector need to connect to the resistor for electrical surge destruction.

１２．This IC is a monolithic IC which (as shown is Fig.4)has P

substrate and between the various pins. A P-N junction is

formed from this P layer of each pin. For example, the relation between each potential is as follows,

○(When GND > PinB and GND > PinA, the P-N junction operates as a parasitic diode.)

○(When PinB > GND > PinA, the P-N junction operates as a parasitic transistor.)

Parasitic diodes can occur inevitably in the structure of the IC. The operation of parasitic diodes can result in mutual

interference among circuits as well as operation faults and physical damage. Accordingly you must not use methods by which

parasitic diodes operate, such as applying a voltage that is lower than the GND (P substrate) voltage to an input pin

Resistance

(PinA)

(PinB)

Transistor (NPN)

Ｃ

Ｂ

Ｅ

ＧＮＤ

Ｐ

Ｎ

ＧＮＤ

Ｐ

Ｎ

Ｐ

P substrate

Ｐ

Ｎ

Ｐ

Ｎ

P substrate

Parasitic diode

(PinB)

ＧＮＤ

Parasitic diode

(PinA)

Parasitic

Ｂ

Ｃ

Ｅ

ＧＮＤ

Parasitic diode

ＧＮＤ

Other adjacent components

Fig.4. Simplified structure of a Bipolar IC

REV. A

Notice

Notes

No copying or reproduction of this document, in part or in whole, is permitted without the

consent of ROHM Co.,Ltd.

The content specified herein is subject to change for improvement without notice.

The content specified herein is for the purpose of introducing ROHM's products (hereinafter

"Products"). If you wish to use any such Product, please be sure to refer to the specifications,

which can be obtained from ROHM upon request.

Examples of application circuits, circuit constants and any other information contained herein

illustrate the standard usage and operations of the Products. The peripheral conditions must

be taken into account when designing circuits for mass production.

Great care was taken in ensuring the accuracy of the information specified in this document.

However, should you incur any damage arising from any inaccuracy or misprint of such

information, ROHM shall bear no responsibility for such damage.

The technical information specified herein is intended only to show the typical functions of and

examples of application circuits for the Products. ROHM does not grant you, explicitly or

implicitly, any license to use or exercise intellectual property or other rights held by ROHM and

other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the

use of such technical information.

The Products specified in this document are intended to be used with general-use electronic

equipment or devices (such as audio visual equipment, office-automation equipment, commu-

nication devices, electronic appliances and amusement devices).

The Products specified in this document are not designed to be radiation tolerant.

While ROHM always makes efforts to enhance the quality and reliability of its Products, a

Product may fail or malfunction for a variety of reasons.

Please be sure to implement in your equipment using the Products safety measures to guard

against the possibility of physical injury, fire or any other damage caused in the event of the

failure of any Product, such as derating, redundancy, fire control and fail-safe designs. ROHM

shall bear no responsibility whatsoever for your use of any Product outside of the prescribed

scope or not in accordance with the instruction manual.

The Products are not designed or manufactured to be used with any equipment, device or

system which requires an extremely high level of reliability the failure or malfunction of which

may result in a direct threat to human life or create a risk of human injury (such as a medical

instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuel-

controller or other safety device). ROHM shall bear no responsibility in any way for use of any

of the Products for the above special purposes. If a Product is intended to be used for any

such special purpose, please contact a ROHM sales representative before purchasing.

If you intend to export or ship overseas any Product or technology specified herein that may

be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to

obtain a license or permit under the Law.

Thank you for your accessing to ROHM product informations.

More detail product informations and catalogs are available, please contact us.

ROHM Customer Support System

http://www.rohm.com/contact/

www.rohm.com

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