KSI-8012-001

2

S6510

Internal Block Diagram

PIN Collection

Pin Number

Pin Name

Pin Function Description

1

Cs

Soft start time capacitor connection pin. The pin charge time to Vref determines

The preheating time of lamp.

2

Timing capacitor connection pin. The timing capacitor is charged and discharged

To generate the sawtooth waveform that determines the oscillator frequency in

the internal oscillator.

3

Rs

Soft start resistor connection pin. The soft start resistor value determines the

initial soft start frequency for preheating.

4

Ldet

Input to the protection circuit. If the pin voltage is lower than Vref, the output oh

The output driver1,2 is inhibited.

5

GND

Ground of the control Section.

6

OUT2

Gate drive output. A push pull output stage is able to drive the Power MOSFET

With peak current of 400mA.

7

OUT1

Gate drive output. A push pull output stage is able to drive the Power MOSFET

With peak current of 400mA.

8

Vcc

Supply Voltage of output driver and control circuits.

-

+

Vth(st)

uvlo

2.5V Ref

40uA Ref

2Vbe

Vz

Vs

-

+

2V

1.5V

uvlo

Self Starter

-

+

CurrentSense

Comparator

ErrorAmplifier

Vref

-

+

2.3V

A

-

+

40uA

Static

OVP

Dynamic

OVP

5pF

40k

+

-

Vref

-

+

Multiplier

Vmo

2V

0.5V

Zero Current

Detector

Q

R

S

INV

MULT

CS

COMP

1

2

3

4

Vcc

GND

IDET

OUT

8

7

6

5

Vm1

Vm2

K=

Vm1-(Vm2-Vref)

Vmo

GainK

Drive Output

18V

Under Voltage Lock Out

-

+

0.4V

Feedback

OVP

.0

10uA