MAX16840_15 Datasheet, PDF (3/12 Pages) Maxim Integrated Products – LED Driver with Integrated MOSFET

MAX16840
LED Driver with Integrated MOSFET
for MR16 and Other 12V AC Input Lamps
Electrical Characteristics (continued)
(VIN = 12V; VEXT = VSOURCE = VFB = VGND = 0V; COMP, REFI, and DRAIN = open; TA = TJ = -40NC to +125NC, unless otherwise
noted. Typical values are at TA = +25NC.) (Note 2)
PARAMETER
SOURCE Current-Limit
Comparator Propagation Delay
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
25
ns
FB Input Bias Current
FB Current-Limit Comparator
Leading-Edge Blanking
REFI Source Current
Foldback Kick in Threshold
FB Average Voltage During
Foldback
FB Average Voltage to REFI
Gain
IFB
VFB = 0V and VFB = 0.3V
VREFI = 1.224V
Falling on REFI
VREFI = 1.15V
VREFI = 1V
VREFI = 0.8V
VREFI = 1V
-1
+1
FA
50
ns
47.5
50
52.5
FA
1.135 1.2 1.255
V
178 189 201
153 164.5 176
mV
120 132 143
6.075
EXT Drive Current
EXT Pulldown Resistance
Thermal-Shutdown Temperature
Thermal Shutdown Hysteresis
VIN = 2V, VEXT = 1V
Temperature rising
12.5
40
mA
5
10
20
kI
165
NC
15
NC
Note 2: All devices are 100% tested at TA = TJ = +25NC. Limits over temperature are guaranteed by design.
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