SI-8010GL datasheet(2/2 Pages) SANKEN

2 / 2 page

ICs

SI-8000GL Series

■External Dimensions (DIP8)

(Unit: mm)

■Block Diagram

CE/SS

UVLO

OCP

P.REG

OSC

PWM

LOGIC

CE/SS

TSD

Reg

Comp

GND

Boot REG

DRIVE

SWOUT

VREF

VIN

Amp

Pin Assignment

1. GND

2. CE/SS

3. Reg

4. SWOUT

5. VIN

6. B.S

7. Comp

8. VREF

Plastic Mold Package Type

Flammability: UL 94V-0

Product Mass: Approx. 0.49 g

SI-8010GL

9.4±0.3

0.5±0.1

0° to 15°

1.0

+0.3

-0.05

1.5

+0.3

-0.05

0.25+0.1

-0.05

2.54

7.6

0.25 M

0.89 TYP

1.8

1.6

1.4

1.2

0.8

0.6

0.4

0.2

–25

100

125

Ambient Temperature Ta (°C)

j-a:100°C/W

■Ta-PD Characteristics

Note 1: The efficiency depends on the input volt-

age and the output current. Therefore, ob-

tain the value from the efficiency graph and

substitute the percentage in the formula

above.

Note 2: Thermal design for D1 must be considered

separately.

VO : Output voltage

VIN : Input voltage

IO : Output current

ηχ : Efficiency

VF : Diode D1 forward voltage

RK16···0.4V(IO=1A)

■Typical Connection Diagram

C1: 220µF/63V

C2: 470µF/25V

C3: 0.1µF

C4: 1000pF

C5: 0.1µF

C6: 0.047µF

C7: 0.1µF

Diode D1

• Be sure to use a Schottky-barrier diode as D1. If other diodes like fast recovery diodes are used, IC may be destroyed because of the reverse voltage generated

by the recovery voltage or ON voltage.

Choke coil L1

• If the winding resistance of the choke coil is too high, the efficiency may drop below the rated value.

• As the overcurrent protection starting current is approx. 2.5 A, take care concerning heat radiation from the choke coil caused by magnetic saturation due to

overload or short-circuited load.

Capacitor C1, C2

•As large ripple currents flow through C1 and C2, use high-frequency and low-impedance capacitors aiming for switching-mode-power-supply use. Especially

when the impedance of C2 is high, the switching waveform may become abnormal at low temperatures. For C2, do not use a capacitor with an extremely low

equivalent series resistance (ESR) such as an OS capacitor or a tantalum capacitor, which may cause an abnormal oscillation.

Resistors R2, R3

• R2 and R3 are the resistors to set the output voltage. Set their values so that IREF becomes approx. 2 mA. Obtain R2 and R3 values by the following formula above.

* To create the optimum operating conditions, place the components as close as possible to each other.

SI-8010GL

Reg

CE/SS

VIN

SWOUT

VREF

VIN

GND

Comp

IREF

GND

B.S

SI-8010GL

C8: 0.1µF

R1: 47Ω

L1: 47µH

D1: RK16

(Sanken)

PD=VO • IO

100

–1 –VF • IO 1–

ηχ

VIN

R2=

(VOUT–VREF)

(VOUT–1)

(Ω), R3 =

VREF

500(Ω)

IREF

2×10–3

IREF

2×10–3

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