Rainbow Electronics MAX16831 - Manual (Page 3)

MAX16831
High-Voltage, High-Power LED Driver with
Analog and PWM Dimming Control
_______________________________________________________________________________________ 3
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
8.7V ≤ (V
HI - V LO ) ≤ 36V, I
CLMP = 1mA 5.5 8.0 10.0
CLMP Regulator Output Voltage V CLMP
5.0V ≤ (V
HI - V LO ) ≤ 8.7V, I
CLMP = 250µA
(V HI - V LO )
- 0.7
V
CURRENT-SENSE AMPLIFIER (CSA)
Differential Input Voltage Range
V CS+ -
V CS-
0 0.3 V
Common-Mode Range 0 V
CC
V
CS+ Input Bias Current I CS+ V CS+ - V CS- = 0.3V -250 +250 µA
CS- Input Bias Current I CS- V CS+ - V CS- = 0.3V 400 µA
Unity-Gain Bandwidth From (CS+ - CS-) to CS 1.0 MHz
REF OUTPUT BUFFER
REF Output Voltage V REF -100µA ≤ I
REF
≤ +100µA 2.85 3.00 3.15 V
DIM DRIVER
V CLMP - V LO = 4V 5 20
Source Current
V
CLMP
- V
LO
= 8V 30 67
mA
V CLMP - V LO = 4V 10 22
Sink Current
V CLMP - V LO = 8V 40 76
mA
GATE DRIVER
DRI UVLO Threshold V UVLO_TH DRI rising 4.0 4.2 4.4 V
DRI UVLO Threshold Hysteresis V UVLO_HYST 0.3 V
Z OUT_L V DRI = 7.0V, DRV sinking 250mA 2.8 4
Driver Output Impedance
Z OUT_H V DRI = 7.0V, DRV sourcing 250mA 5.0 8
Ω
Peak Sink Current I SK V DRI = 7.0V 2.5 A
Peak Source Current I SR V DRI = 7.0V 1.4 A
PWM, ILIM, AND HICCUP COMPARATOR
PWM Comparator Offset Voltage V COMP - (V SNS+ - V SNS-) 0.7 V
Peak Current-Limit Comparator
Trip Threshold
160 200 240 mV
Peak Current-Limit Comparator
Propagation Delay (Excluding
Blanking Time)
50mV overdrive 40 ns
HICCUP Comparator Trip
Threshold
235 300 385 mV
SNS+ Input Bias Current V
SNS+
= 0V, V
SNS-
= 0V -100 -65 µA
SNS- Input Bias Current V SNS+ = 0V, V SNS- = 0V -100 -65 µA
Blanking Time t BLNK 40 ns
ELECTRICAL CHARACTERISTICS (continued)
(V CC = V UVEN = 14V, C REG1 = 1µF, C REG2 = 1µF, C CLMP = 0.1µF, R T = 25kΩ, T A = T J = -40°C to +125°C, unless otherwise noted.
Typical specifications are at T A = +25°C.)