ssl1750 NXP Semiconductors, ssl1750 Datasheet - Page 19

• Manufacturer Part Number: ssl1750
• Description: Smps Control Ic For Led Drivers
• Manufacturer: NXP Semiconductors

NXP Semiconductors
8. Limiting values
SSL1750_1
Product data sheet
7.3.10 Driver (pin FBDRIVER)
7.3.9 Overcurrent protection (pin FBSENSE)
The primary peak current in the transformer is measured accurately cycle-by-cycle using
the external sense resistor R
to an internal level (see also
leading edge blanking period, t
The driver circuit to the gate of the external power MOSFET has a current sourcing
capability of typically 500 mA and a current sink capability of typically 1.2 A. This permits
fast turn-on and turn-off of the power MOSFET for efficient operation.
Table 3.
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol
Voltages
V
V
V
V
V
V
V
V
V
V
Currents
I
I
I
FBCTRL
FBAUX
PFCSENSE
Fig 14. OCP leading edge blanking
CC
LATCH
FBCTRL
PFCCOMP
VINSENSE
VOSENSE
PFCAUX
FBSENSE
PFCSENSE
HV
Limiting values
Parameter
supply voltage
voltage on pin LATCH
voltage on pin FBCTRL
voltage on
pin PFCCOMP
voltage on
pin VINSENSE
voltage on
pin VOSENSE
voltage on pin PFCAUX
voltage on
pin FBSENSE
voltage on
pin PFCSENSE
voltage on pin HV
current on pin FBCTRL
current on pin FBAUX
current on
pin PFCSENSE
Rev. 01 — 15 September 2008
OCP LEVEL
V
LEB (t
FBSENSE
Section
SENSE2
leb
leb
, to prevent false triggering caused by switch-on spikes.
)
Conditions
current limited
current limited
current limited
. The OCP circuit limits the voltage on pin FBSENSE
7.3.3). The OCP detection is suppressed during the
014aaa022
SMPS control IC for LED drivers
t
Min
0.4
0.4
0.4
0.4
0.4
0.4
25
0.4
0.4
0.4
3
1
1
SSL1750
© NXP B.V. 2008. All rights reserved.
Max
+38
+5
+5
+5
+5
+5
+25
+5
+5
+650
0
+1
+10
Unit
V
V
V
V
V
V
V
V
V
V
mA
mA
mA
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