www.austriamicrosystems.com/AS3635

1.4-8

15 - 20

AS3635

Datasheet - A p p l i c a t i o n I n f o r m a t i o n

9 Application Information

External Components

Following transformers are recommend for the AS3635 (due to the OTP programming features see section Trimming

specification during charging.

IGBT

As the AS3635 has an internal charge pump included, 2.5V, 2.7V and 4V IGBT can be used without limit on the supply

1. Powering of the Xenon tube and generating together with the oscillation circuit consisting of

ing edge of the gate of the IGBT

2. Switching off the current through the Xenon tube at the end of the flash pulse to accurately control the light

emitted by the flash. To protect the IGBT the switching off falling edge voltage should be less than 400V/µs

(measured on the emitter of the IGBT)

Both requirements are achieved with the internal driving circuit of the AS3635. Internal OTP trimming allows to adopt

to different trigger coils and IGBTs.

Table 4. Recommended Transformers

Component

Part Number

N

L

Size (mm)

Manufacturer

C3-T2.5R

10.2

6.7µH

3.4x3.4x2.5

Mitsumi Electric

www.mitsumi.co.jp

TTRN-3825H

10.2

7µH

3.8x3.8x2.5

Tokyo Coil

www.tokyo-coil.co.jp

TTRN-3822H

10.2

7µH

3.8x3.8x2.2

TTRN-5820H

10.2

8.87µH

5.8x5.8x2.0

TTRN-0520H

10.41

8.35µH

5.0x5.0x2.0

LDT4520T-01

10.2

10µH

4.7x4.5x2.0

TDK

www.tdk.com

ATB322515

10.2

7µH

3.2x2.5x1.55

(H is max)

BO-02

7.3x2.5(3.5)x2.2

Tokyo Coil

www.tokyo-coil.co.jp

Table 5. Recommended IGBTs

Component

Part Number

min. Drive Voltage

Size

Manufacturer

RJP4002ANS

2.5V

VSON-8

3 x 4.8mm

Renesas

www.renesas.com

RJP4003ANS

4.0V

RJP4006AGE

1

1. Add a series resistor of 68

Ω in the gate drive.

2.7V

2.85x3.05x1.1

mm (H is max.)

GT8G133

4.0V

TSSOP-8

3.3 x 6.4mm

Toshiba

www.semicon.toshiba.co.jp

TIG058E8

2

2. Add a series resistor of 47

Ω in the gate drive.

4.0V

ECH8

2.8 x 2.9mm

Sanyo

www.sanyo.com