Rainbow Electronics MAX16820 - Manual (Page 3)

MAX16819/MAX16820
2MHz High-Brightness LED Drivers with
High-Side Current Sense and 5000:1 Dimming
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PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
GATE DRIVER
Gate Driver Source Current V CSN = V IN , V DRV = 0.5 x V CC 0.5 A
Gate Driver Sink Current V CSN = V IN - 250mV, V DRV = 0.5 x V CC 1 A
Gate Driver Output-Voltage High V
OH
I
DRV
= 10mA V
CC
- 0.5 V
Gate Driver Output-Voltage Low V
OL
I
DRV
= -10mA 0.5 V
DIM INPUT
Maximum DIM Frequency f DIM 20 kHz
DIM Input-Voltage High V IH
V
CSN
= V
IN
, increase DIM until V
DRV
>
(V CC - 0.5V)
2.8 V
DIM Input-Voltage Low V
IL
V CSN = V IN , decrease DIM until
V
DRV
< 0.5V
0.6 V
DIM Hysteresis DIM
HYS
200 mV
DIM Turn-On Time t DIMON
DIM rising edge to V DRV = 0.5 x V CC ,
C DRV = 1nF
100 ns
DIM Turn-Off Time t DIMOFF
DIM falling edge to V
DRV
= 0.5 x V
CC
,
C DRV = 1nF
100 ns
DIM Input Leakage High V
DIM
= V
IN
10 µA
DIM Input Leakage Low V
DIM
= 0V -1 +1 µA
V CC REGULATOR
I VCC = 0.1mA to 10mA, V IN = 5.5V to 28V 4.5 5.5 V
Regulator Output Voltage V CC
I VCC = 0.1mA to 10mA, V IN = 4.5V to 28V 4.0 5.5 V
Load Regulation I VCC = 0.1mA to 10mA, V IN = 12V 4 Ω
Line Regulation V IN = 6V to 28V, I VCC = 10mA 11 mV
Power-Supply Rejection Ratio PSRR V
IN
= 12V, I
VCC
= 5mA, f
IN
= 10kHz -35 dB
V
IN
= 4.5V, V
CC
= 0V 45 mA
Current Limit I
LIM
V IN = 4.5V, V CC = 4V 18 mA
Regulator Startup Time t STRAT V CC = 0 to 4.5V 350 µs
ELECTRICAL CHARACTERISTICS (continued)
(V IN = 12V, V DIM = V IN , C VCC = 1µF, R SENSE = 0.5Ω, T A = T J = -40°C to +125°C, unless otherwise noted. Typical values are at
T A = +25°C.) (Note 1)
Note 1: All devices are 100% production tested at T J = +25°C and +125°C. Limits to -40°C are guaranteed by design.