MP24833A – 55V, 3A, WHITE LED DRIVER
MP24833A Rev. 1.01 www.MonolithicPower.com 4
1/13/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2017 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
V
IN
= 12V, T
J
= -40°C~125°C, all voltages with respect to VSS, unless otherwise noted.
Parameters Symbol Condition Min Typ Max Units
Feedback voltage V
FB
4.5V
V
IN
55V
0.19 0.2 0.21 V
Feedback current I
FB
V
FB
= 0.22V -100 100 nA
Switch on resistance R
DS
ON
150 280 mΩ
Switch leakage V
EN
= 0V, V
SW
= 0V 1 μA
Current limit 3 4.8 A
Oscillator frequency f
SW
145 210 275 kHz
Foldback frequency V
FB
= 0V, V
OVP
= 0V 37 kHz
Maximum duty cycle 85 91 97 %
Minimum on time
5
t
ON
100 ns
Under-voltage lockout threshold rising 3 3.3 3.6 V
Under voltage lockout threshold hysteresis 200 mV
EN input current V
EN
= 2V 2.1 μA
EN off threshold (with respect to INGND) V
EN
falling 0.4 V
EN on threshold (with respect to INGND) V
EN
rising 0.6 V
Minimum EN dimming threshold V
FB
= 0V 0.57 0.67 0.77 V
Maximum EN dimming threshold V
FB
= 0.2V 1.23 1.35 1.47 V
Supply current (quiescent) I
Q
V
EN
= 2V, V
FB
= 1V 0.6 0.8 mA
Supply current (quiescent) at EN off I
off
V
EN
= 0V 6 12 μA
Thermal shutdown
150 °C
Thermal shutdown recovery hysteresis 15 °C
Open LED OV threshold V
OVP
th
2.3 2.43 2.6 V
Open LED OV hysteresis V
OVP
h
s
80 mV
NOTES:
5) Guaranteed by design.
6) Guaranteed by characterization.
