Datasheet

LED Driver with Integrated MOSFET
for MR16 and Other 12V AC Input Lamps
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 12V; V
EXT
= V
SOURCE
= V
FB
= V
GND
= 0V; COMP, REFI, and DRAIN = open; T
A
= T
J
= -40NC to +125NC, unless otherwise
noted. Typical values are at T
A
= +25NC.) (Note 2)
Note 2: All devices are 100% tested at T
A
= T
J
= +25NC. Limits over temperature are guaranteed by design.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SOURCE Current-Limit
Comparator Propagation Delay
25 ns
FB Input Bias Current I
FB
V
FB
= 0V and V
FB
= 0.3V -1 +1
FA
FB Current-Limit Comparator
Leading-Edge Blanking
50 ns
REFI Source Current V
REFI
= 1.224V 47.5 50 52.5
FA
Foldback Kick in Threshold Falling on REFI 1.135 1.2 1.255 V
FB Average Voltage During
Foldback
V
REFI
= 1.15V 178 189 201
mVV
REFI
= 1V 153 164.5 176
V
REFI
= 0.8V 120 132 143
FB Average Voltage to REFI
Gain
V
REFI
= 1V 6.075
EXT Drive Current V
IN
= 2V, V
EXT
= 1V 12.5 40 mA
EXT Pulldown Resistance 5 10 20
kI
Thermal-Shutdown Temperature Temperature rising 165
NC
Thermal Shutdown Hysteresis
15
NC
Maxim Integrated
3
MAX16840
Maxim Integrated
3