FSP34063 datasheet(2/10 Pages) FOSLINK

2 / 10 page

UNIVERSAL DC/DC CONVERTER

2007-1-25

2/10

FSP34063

ABSOLUTE MAXIMUM RATINGS

Symbol

Parameter

Rating

Unit

VCC

Power Supply Voltage

VIR

Comparator Input Voltage Range

-0.3~+40

VC(switch)

Switch Collector Voltage

VE(switch)

Switch Emitter Voltage(VPin1=40V)

VCE(switch)

Switch Collector to Emitter Voltage

VC(driver)

Driver Collector Voltage

IC(driver)

Driver Collector Current(Note1)

100

ISW

Switch Current

1.6

600

θJA

SOP8L: TA=25℃

Thermal Resistance

160

℃

1.25

θJA

Power Dissipation and Thermal

Characteristics

PDIP8L: TA=25℃

Thermal Resistance

100

℃

Operating Junction Temperature

+150

℃

Operating Ambient Temperature Range

0~+70

-40~+85

℃

Tstg

Storage Temperature Range

-65~+150

℃

Notes: 1.Maximum package power dissipation limits must be observed.

2.ESD data available upon request.

ELECTRICAL CHARACTERISTICS(VCC=5V, UNLESS OTHERWISE NOTED)

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

Oscillator section

fosc

Frequency

VPin 5=0V, CT=1.0nF, TA=25℃

kHz

Ichg

Charge Current

VCC=5.0V to 40V, TA=25℃

µA

Idischg

Discharge Current

VCC=5.0V to 40V, TA=25℃

140

200

260

µA

Idischg/Ichg

Discharge to Charge

Current Ratio

Pin7 to Vcc, TA=25℃

5.2

6.5

7.5

Vipk(sense)

Current Limit Sense

Voltage

Ichg=Idischg, TA=25℃

300

400

450

Output switch section

VCE(sat)

Saturation Voltage,

Darlington Connection

ISW=1.0A, Pins 1,8 connected

1.0

1.3

VCE(sat)

Saturation Voltage,

Darlington Connection

ISW=1.0A, ID=50mA, Forced β120

0.45

0.7

hFE

DC Current Gain

ISW=1.0A, VCE=5.0V, TA=25℃

IC(off)

Collector Off-State

Current

VCE=40V

0.01

100

µA

Comparator section

Vth

Threshold Voltage

TA=25℃

T=0℃~75℃

1.225

1.21

1.25

1.275

1.29

Reg(line)

Threshold Voltage Line

Regulation

VCC=3.0V to 40V

1.4

6.0

Total device

ICC

Supply Current

VCC=5.0V to 40V, CT=1.0nF,

Pin7=VCC, VPin5＞Vth, Pin2=Gnd,

remaining pins open

3.5

Note: 3.Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient

temperature as possible.

4.If the output switch is driven into hard saturation(non-Darlington configuration) at low switch currents(≤300mA)

and high driver currents(≥30mA), it may take up to 2.0µs for it to come out of saturation. This condition will

shorten the off time at frequencies≥30kHz, and is magnified at high temperatures. This condition does not occur

with a Darlington configuration, since the output switch cannot saturate. If a non-Darlington configuration is

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