Rainbow Electronics MAX16831 - Manual (Page 4)

MAX16831
High-Voltage, High-Power LED Driver with
Analog and PWM Dimming Control
4 _______________________________________________________________________________________
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.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
ERROR AMPLIFIER
FB Input Bias Current -100 +100 nA
EAMP Output Sink Current V
FB
= 1.735V, V
COMP
= 1V 3 7 mA
EAMP Output Source Current V FB = 0.735V, V COMP = 1V 2 7 mA
EAMP Input Common-Mode
Voltage
0 3.0 V
EAMP Output Clamp Voltage 1.1 1.7 2.4 V
Voltage Gain A V R COMP = 100k Ω to AGND 80 dB
Unity-Gain Bandwidth GBW
R COMP = 100k Ω to AGND, C
COMP = 100pF
to AGND
0.5 MHz
OSCILLATOR, OSC SYNC, CLK, AND CLKOUT
f SWMIN 125
RTSYNC Frequency Range
f SWMAX 500
kHz
R T = 25k Ω 475 500 525
RTSYNC Oscillator Frequency
R T = 100k Ω 106 125 143
kHz
RTSYNC High-Level Voltage V SIHL 2.8 V
RTSYNC Low-Level Voltage V SILL 0.4 V
CLKOUT High Level I SINK = 0.8mA 2.8 V
CLKOUT Low Level I SOURCE = 1.6mA 0.4 V
CLKOUT Maximum Load
Capacitance
C
CLK_CAP
f
SW
= 500kHz 500 pF
DIM SYNC, DIM RAMP, AND DIM PWM GEN
Internal Ramp Frequency f RAMP 160 200 240 Hz
External Sync Frequency Range f DIM 80 2000 Hz
External Sync Low-Level Voltage V LTH 0.4 V
External Sync High-Level Voltage V HTH 3.2 V
DIM Comparator Offset V DIMOS 170 200 300 mV
DIGITAL SOFT-START
Soft-Start Duration t SS 4.0 ms
OVERVOLTAGE COMPARATOR, LOAD OVERCURRENT COMPARATOR
OVP Overvoltage Comparator
Threshold
V OV V OV rising 1.20 1.235 1.27 V
OVP Overvoltage Comparator
Hysteresis
V OV_HYST 63.5 mV
SLOPE COMPENSATION
Slope Compensation Peak
Voltage Per Cycle
Clock generated by R T 120 mV
Slope Compensation External clock applied to RTSYNC 15 mV/µs