FREQ datasheet(9/56 Pages) FUJITSU

9 / 56 page

MB39A214A

Limitation : development tool vendor use only

FUJITSU SEMICONDUCTOR CONFIDENTIAL

DS405-00007-1v0-E

Value

Parameter

Symbol

No.

Condition

Min

Typ

Max

Unit

BST diode voltage

1,12 IF = 10 mA

0.75

0.85

0.95

Output Block

[DRV]

Bias current

IBST

1,12

LX1, LX2 = 0 V,

BST1, BST2 = 5.2 V

µA

Preset value 1

conditions

VFREQ1

FREQ pin:

GND connection

—

0.2

Preset value 2

conditions

VFREQ2

FREQ pin: OPEN

0.6

—

1.2

Preset value 3

conditions

VFREQ3

FREQ pin: VB connection

2.4

—

Switching

Frequency

Control Block

[FREQ]

FREQ pin

output voltage

VFREQ

FREQ = OPEN

0.63

0.9

1.17

PFM/PWM mode

conditions

PAF function

negate

VPFM1

MODE pin:

GND connection

—

0.2

PFM/PWM mode

conditions

PAF function

assert

VPFM2

MODE pin : OPEN

0.6

—

1.2

PWM-fixed mode

conditions

VPWM

MODE pin : VB connection

4.6

—

PAF frequency

fPAF

—

Ta =

− 30°C to +85°C

—

kHz

PFM Control

Circuit Block

[MODE]

MODE pin voltage

VMODE

MODE = OPEN

0.63

0.9

1.17

ON condition

VON

2, 11 EN1, EN2 pins

2.64

—

OFF condition

VOFF

2, 11 EN1, EN2 pins

—

0.66

Hysteresis width

2, 11 EN1, EN2 pins

—

0.4*

—

Enable Block

[EN1 , EN2]

Input current

IEN

2, 11 EN1, EN2 = 5V

µA

Standby current

ICCS

EN1, EN2 = 0V

—

µA

Power supply

current during idle

period

ICC1

LX1, LX2 = 0 V

BST1, BST2 :

VB connection

FB1, FB2 = 0.75 V

—

600

860

µA

Power Supply

Current

Power supply

current during

operation

ICC2

LX1, LX2 = 0V

BST1, BST2 :

VB connection

FB1, FB2 = 0.6 V

—

1200

1700

µA

*: This parameter is not be specified. This should be used as a reference to support designing the circuits.

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