MAX16831 Datasheet, PDF (4/20 Pages) Maxim Integrated Products – High-Voltage, High-Power LED Driver with Analog and PWM Dimming Control

High-Voltage, High-Power LED Driver with
Analog and PWM Dimming Control
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
ERROR AMPLIFIER
FB Input Bias Current
EAMP Output Sink Current
EAMP Output Source Current
V_FB = 1.735V, V_COMP = 1V
V_FB = 0.735V, V_COMP = 1V
EAMP Input Common-Mode
Voltage
EAMP Output Clamp Voltage
Voltage Gain
A_V
R_COMP = 100kΩ to AGND
Unity-Gain Bandwidth
GBW
R_COMP = 100kΩ to AGND, C_COMP = 100pF
to AGND
OSCILLATOR, OSC SYNC, CLK, AND CLKOUT
RTSYNC Frequency Range
RTSYNC Oscillator Frequency
RTSYNC High-Level Voltage
RTSYNC Low-Level Voltage
CLKOUT High Level
CLKOUT Low Level
f_SWMIN
f_SWMAX
V_SIHL
V_SILL
R_T = 25kΩ
R_T = 100kΩ
I_SINK = 0.8mA
I_SOURCE = 1.6mA
CLKOUT Maximum Load
Capacitance
C_{CLK_CAP} f_SW = 500kHz
MIN
-100
3
2
0
1.1
500
475
106
2.8
2.8
TYP
7
7
1.7
80
0.5
500
125
MAX UNITS
+100
3.0
2.4
nA
mA
mA
V
V
dB
MHz
125
kHz
525
kHz
143
V
0.4
V
V
0.4
V
500
pF
DIM SYNC, DIM RAMP, AND DIM PWM GEN
Internal Ramp Frequency
f_RAMP
External Sync Frequency Range
f_DIM
External Sync Low-Level Voltage
External Sync High-Level Voltage
V_LTH
V_HTH
DIM Comparator Offset
DIGITAL SOFT-START
V_DIMOS
Soft-Start Duration
t_SS
OVERVOLTAGE COMPARATOR, LOAD OVERCURRENT COMPARATOR
160
200
240
Hz
80
2000
Hz
0.4
V
3.2
V
170
200
300
mV
4.0
ms
OVP Overvoltage Comparator
Threshold
V_OV
V_OV rising
1.20 1.235 1.27
V
OVP Overvoltage Comparator
Hysteresis
SLOPE COMPENSATION
V_{OV_HYST}
63.5
mV
Slope Compensation Peak
Voltage Per Cycle
Slope Compensation
Clock generated by R_T
External clock applied to RTSYNC
120
mV
15
mV/µs
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