SSL2109T

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© NXP B.V. 2012. All rights reserved.

Product data sheet

Rev. 2 — 26 April 2012

10 of 19

NXP Semiconductors

SSL2109T

GreenChip controller for LED lighting

8.10.1 Soft-start function

The NTC pin can be used to make a soft start function. During switch-on, the level on the

NTC pin is low. By connecting a capacitor (in parallel with the NTC resistor), a time

constant can be defined. The time constant causes the level on the NTC pin to increase

Figure 5 (4) is reached.

9.

Limiting values

[1]

An internal clamp sets the supply voltage and current limits.

[2]

Human body model: equivalent to discharging a 100 pF capacitor through a 1.5 k

 series resistor.

[3]

Charged device model: equivalent to charging the IC up to 1 kV and the subsequent discharging of each

pin down to 0 V over a 1

 resistor.

Table 4.

Limiting values

In accordance with the Absolute Maximum Rating System (IEC 60134).

Symbol

Parameter

Conditions

Min

Max

Unit

General

SR

slew rate

on pin DRAIN

5

+5

V/ns

conversion frequency

-

200

kHz

total power dissipation

SO8 package

-

0.6

W

ambient temperature

40

+125

C

junction temperature

40

+150

C

storage temperature

55

+150

C

Voltages

supply voltage

continuous [1]

0.4

+14

V

voltage on pin DRAIN

600 V version

0.4

+600

V

voltage on pin HV

current limited

0.4

+600

V

voltage on pin SENSE

current limited

0.4

+5.2

V

voltage on pin NTC

current limited

0.4

+5.2

V

Currents

supply current

at pin VCC

-

20

mA

current on pin DVDT

duration 20

s

maximum

-

1.3

A

electrostatic discharge

voltage

human body

model; (for all pins

except DRAIN and

HV)

[2]

2

+2

kV

human body

model for DRAIN

and HV

1

+1

kV

charged device

[3]

500

+500

V