SSL3401HN Datasheet, PDF (9/29 Pages) NXP Semiconductors – Low voltage dimmable controller for LED lighting

NXP Semiconductors
SSL3401HN
Low voltage dimmable controller for LED lighting
Table 4. Latching current setting
Symbol Parameter
V_set(I)latch latching current setting voltage
Conditions
latching current = +0.00 A; V_DD = 3.3 V;
R_ICBST = 200 m
latching current = +0.5 A; V_DD = 3.3 V;
R_ICBST = 200 m
latching current = +0.75 A; V_DD = 3.3 V;
R_ICBST = 200 m
latching current = +1.00 A; V_DD = 3.3 V;
R_ICBST = 200 m
latching current = +1.25 A; V_DD = 3.3 V;
R_ICBST = 200 m
latching current = +1.50 A; V_DD = 3.3 V;
R_ICBST = 200 m
latching current = +1.75 A; V_DD = 3.3 V;
R_ICBST = 200 m
latching current = +2.00 A; V_DD = 3.3 V;
R_ICBST = 200 m
latching current = +2.25 A; V_DD = 3.3 V;
R_ICBST = 200 m
latching current = +2.5 A; V_DD = 3.3 V;
R_ICBST = 200 m
latching current = 0 A; V_DD = 3.3 V;
R_ICBST = 200 m
Min Typ Max Unit
0
- 0.20 V
0.20 - 0.41 V
0.41 - 0.61 V
0.61 - 0.82 V
0.82 - 1.03 V
1.03 - 1.23 V
1.23 - 1.54 V
1.54 - 1.85 V
1.85 - 2.16 V
2.16 - 2.47 V
2.47 -
V_DD V
The average and latching input current vary in inverse proportion to R_ICBST.
The system input signal is a rectified 50 Hz sine wave signal. The latching current, in the
form of a transient input peak current, occurs once every 10 ms at the start of the sine
wave signal with a decay time constant of 250 s.
—V
ODWFKLQJFXUUHQW
DYHUDJHFXUUHQW
—V
KDOIPDLQVF\FOHPVZLWK+]
Fig 4. Latching current
DDD
8.5 LED current control
The SSL3401HN provides a Pulse Width Modulated (PWM) signal to control the LED
current. The signal is continuously LOW for the maximum LED current setting and HIGH
for the minimum LED current setting. The frequency is set to 12 kHz. If it concerns a DC
supply, it is set continuously LOW. The IC automatically detects the supply type
(AC or DC).
SSL3401HN
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 28 January 2014
© NXP B.V. 2014. All rights reserved.
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