FSB50825AS datasheet(6/10 Pages) FAIRCHILD

No. de pieza	FSB50825AS

Descripción Electrónicos	Smart Power Module (SPM짰)

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Fabricante Electrónico	FAIRCHILD [Fairchild Semiconductor]

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FSB50825AS Rev. A

Note:

1. Parameters for bootsrap circuit elements are dependent on PWM algorithm. For 15 kHz of switching frequency, typical example of parameters is shown above.

2. RC coupling(R5 and C5) and C4 at each input of SPM

® and Micom (indicated as dotted lines) may be used to prevent improper signal due to surge noise.

3. Bold lines should be short and thick in PCB pattern to have small stray inductance of circuit, which results in the reduction of surge voltage. Bypass capacitors such as C1, C2

and C3 should have good high-frequencycharacteristics to absorb high-frequency ripple current.

Figure 3. Recommended CPU Interface and Bootstrap Circuit with Parameters

Note:

Attach the thermocouple on top of the heatsink-side of SPM® (between SPM® and heatsink if applied) to get the correct temperature measurement.

Figure 4. Case Temperature Measurement

Figure 5. Temperature profile of Vts(typ.)

HIN

LIN

Output

Note

0

Z

Both FRFET Off

0

1

0

Low side FRFET On

1

0

VDC

High side FRFET On

1

Forbidden

Shoot through

Open

Z

Same as (0,0)

COM

VCC

LIN

HIN

VB

HO

VS

LO

P

N

R

3

Inverter

Output

C

3

C

1

15V

Line

10mF

One Leg Diagram of SPM

These values depend on PWM

control algorithm

* Example of bootstrap paramters

:

C

1= C2 =1mF ceramic capacitor

R

5

C

5

V

DC

C

2

Vts

* Example circuit : V phase

C

4

V

20

40

60

80

100

120

140

160

0.5

1.0

1.5

2.0

2.5

3.0

3.5

THVIC [deg]

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FSB50825AS Datasheet(PDF) 6 Page - Fairchild Semiconductor

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