Fujitsu MB3878 manual Amplifier block Output source

Page 8

MB3878

(Continued)

(Ta = +25 °C, VCC = 19 V, VCC (O) = 19 V, VREF = 0 mA)

Parameter

Symbol

Pin

Conditions

 

Value

 

Unit

No.

Min

Typ

Max

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Output voltage

VOUTCH

2, 10

4.7

4.9

V

 

 

 

 

 

 

 

 

Current detection

VOUTCL

2, 10

20

200

mV

 

amplifier block

Output source

ISOURCE

2, 10

OUTC1 = OUTC2 = 2 V

2.0

0.6

mA

(Current Amp.1,

current

 

 

 

 

 

 

 

Current Amp.2)

 

 

 

 

 

 

 

 

Output sink

ISINK

2, 10

OUTC1 = OUTC2 = 2 V

150

300

A

 

 

current

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PWM comparator

 

VTL

5, 7,

Duty cycle = 0 %

1.4

1.5

V

block

Threshold voltage

 

15

 

 

 

 

 

 

5, 7,

 

 

 

 

 

(PWM Comp.)

 

VTH

Duty cycle = 100 %

2.5

2.6

V

 

 

 

15

 

 

 

 

 

 

Output source

ISOURCE

20

OUT = 11 V, Duty 5 %

200*

mA

 

current

(t = 1 / fOSC Duty)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Output sink

ISINK

20

OUT = 16 V, Duty 5 %

200*

mA

 

current

(t = 1 / fOSC Duty)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Output block

Output ON

ROH

20

OUT = −45 mA

8.0

12.0

Ω

(OUT)

resistor

ROL

20

OUT = 45 mA

6.5

9.7

Ω

 

 

 

 

 

 

 

 

 

 

Rise time

tr1

20

OUT = 3300 pF

70*

ns

 

(equivalent to Si4435 1)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fall time

tf1

20

OUT = 3300 pF

60*

ns

 

(equivalent to Si4435 1)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CTL input voltage

VON

14

Active mode

2

25

V

 

 

 

 

 

 

 

 

Control block

VOFF

14

Standby mode

0

0.8

V

 

(CTL)

Input current

ICTLH

14

CTL = 5 V

100

200

A

 

 

 

 

 

 

 

 

 

ICTLL

14

CTL = 0 V

0

1

A

 

 

 

 

 

 

 

 

 

 

 

Bias voltage

 

 

 

VCC = VCC (O)

VCC

VCC

VCC

 

Output voltage

VH

19

= 7 V to 25 V,

V

block (VH)

5.5

5.0

4.5

 

 

 

VH = 0 to 30 mA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Standby current

ICCS

18,

VCC = VCC (O) ,

0

10

A

 

19

CTL = 0 V

General

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Power supply

ICC

18,

VCC = VCC (O) ,

8.0

12.0

mA

 

 

current

19

CTL = 5 V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

* : Standard design value

8

Image 8
Contents Package FeaturesDescription PIN Assignment TOP ViewPin No Symbol Descriptions PIN DescriptionBlock Diagram Parameter Symbol Conditions Rating Unit Min Max Absolute Maximum RagingsRecommended Operating Conditions ParameterElectrical Characteristics Parameter Symbol Pin Conditions Value Unit Min TypParameter Symbol Pin Conditions Value Unit Min Typ Max Outd = 1 mA 100 On resistor200 Amplifier block Output source Typical Characteristics Triangular wave oscillator Deg Functional Description PWM comparator block PWM Comp Output block OUTControl block CTL Bias voltage block VHSetting the Charging Voltage Method of Setting the Charging CurrentMethod of Setting the SOFT-START Time Method of Setting the Triangular Wave Oscillator FrequencyOperation Timing Diagram AC Adaptor Voltage DetectionProcessing Without USE of the CS PIN Vcco OUT VIN BattApplication Example OUTC2Parts No Reference Data BattVCC Vishay Siliconix Usage Precautions Ordering InformationPart number Package Remarks MB3878PFVPackage Dimension IndexFujitsu Limited