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Datasheet

Datasheet

BD7673AG

TSZ02201-0F2F0A200120-1-2

© 2013 ROHM Co., Ltd. All rights reserved.

16.Jul.2015 Rev.002

www.rohm.com

TSZ22111・15・001

●Electrical Characteristics of control block (Unless otherwise noted, Ta = 25

C, VCC=12V)

Parameter

Symbol

Specifications

Unit

Conditions

MIN

TYP

MAX

[PWM Type DCDC Driver Block]

Oscillation Frequency

60

65

70

KHz

FB=2.0V

average frequency

Frequency Hopping Width 1

-

4.0

-

KHz

FB=2.0V

Hopping Fluctuation Frequency

93

125

157

Hz

Minimum Pulse Width

-

500

-

ns

Soft Start Time 1

0.75

1.00

1.25

ms

Soft Start Time 2

6.00

8.00

10.00

ms

Maximum Duty 1

68.0

75.0

82.0

%

During normal operation

Maximum Duty 2

5.0

15.0

25.0

%

During soft start

Maximum Duty 3

15.0

25.0

35.0

%

During soft start

FB pin Pull-up Resistance

15

20

25

kΩ

⊿

FB / ⊿CS Rain

Gain

-

5

-

V/V

FB Burst Voltage

0.20

0.30

0.40

V

During FB drop

FB OLP Voltage 1a

2.5

2.8

3.1

V

When overload is detected

(FB rise)

FB OLP Voltage 1b

-

2

-

V

When overload is detected

(FB drop)

FB OLP Timer

187

250

312

ms

Latch Release Voltage

(VCC pin voltage)

-

5

-

V

Latch release voltage

VCCUVLO2-0.5 [V]

Latch Mask Time

50

100

200

us

VCCOVP, COMP

Mask time

[Overcurrent Detection Block]

Overcurrent Detection Voltage

0.475

0.500

0.525

V

Leading Edge Blanking Time

-

250

-

ns

[Output Driver Block]

OUT pin Pch MOS Ron

10

25

39

Ω

OUT pin Nch MOS Ron

3

7

12

Ω

[External Latch Comparator Block]

COMP pin Latch Detection

Voltage

-

0.5

-

V

COMP pin Pull-up Resistance

-

25.9

-

kΩ

Thermistor Resistance

Detection Value

3.30

3.70

4.10

kΩ

Thermistor connected

to COMP pin