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SSL2109T Datasheet(PDF) 10 Page - NXP Semiconductors

Part No. SSL2109T
Description  GreenChip controller for LED lighting
Download  19 Pages
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Maker  NXP [NXP Semiconductors]
Homepage  http://www.nxp.com
Logo NXP - NXP Semiconductors

SSL2109T Datasheet(HTML) 10 Page - NXP Semiconductors

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SSL2109T
All information provided in this document is subject to legal disclaimers.
© 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
slowly. When passing level Vth(low)NTC Figure 5 (3), the convertor starts with half of the
maximum current. The output current slowly increases to maximum when Vth(high)NTC
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
fconv
conversion frequency
-
200
kHz
Ptot
total power dissipation
SO8 package
-
0.6
W
Tamb
ambient temperature
40
+125
C
Tj
junction temperature
40
+150
C
Tstg
storage temperature
55
+150
C
Voltages
VCC
supply voltage
continuous [1]
0.4
+14
V
VDRAIN
voltage on pin DRAIN
600 V version
0.4
+600
V
VHV
voltage on pin HV
current limited
0.4
+600
V
VSENSE
voltage on pin SENSE
current limited
0.4
+5.2
V
VNTC
voltage on pin NTC
current limited
0.4
+5.2
V
Currents
IDD
supply current
at pin VCC
-
20
mA
IDVDT
current on pin DVDT
duration 20
s
maximum
-
1.3
A
VESD
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


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