MAX16805_07 Datasheet, PDF (4/19 Pages) Maxim Integrated Products – EEPROM-Programmable, High-Voltage, 350mA LED Drivers with LED Current Foldback

EEPROM-Programmable, High-Voltage, 350mA
LED Drivers with LED Current Foldback
ELECTRICAL CHARACTERISTICS (continued)
(V_IN = V_EN = 12V, C_V5 = 0.1µF, I_V5 = 0, CS- = GND, R_SENSE = 0.56Ω, V_DIM = 4V, DGND = GND, TFP/SCL = 5V, TFN/SDA = 0V,
SW = CFD = Open, T_A = T_J = -40°C to +125°C, unless otherwise noted. Typical values are at T_A = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Maximum Thermal Foldback
Clamp Current Reduction Range
TF_C(MAX) +25^oC ≤ T_A ≤ +125^oC
100
%
Default Thermal Foldback Clamp
Current Reduction Range
THERMAL PROTECTION
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
LED CURRENT FOLDBACK
TF_DEF
Thermal Foldback Clamp register at
factory default (0x07),
+25^oC ≤ T_A ≤ +125^oC
T_J(SHDN)
40
%
+155
°C
+23
°C
Minimum Input LED Current
Foldback Range
V_CFD(MIN)
11.4
V
Maximum Input LED Current
Foldback Range
V_CFD(MAX)
16.4
V
LED Current Foldback Default
Level
V_CFD
LED Current Foldback Threshold register
at factory default (0x00)
16.4
V
LED Current Foldback Voltage
Step Size
INTERNAL RAMP GENERATOR
Internal RAMP Frequency
External Sync Frequency Range
External Sync Voltage Low
External Sync Voltage High
Output Current Duty Cycle
f_RAMP
f_DIM
I_DC
V_IN > 11V, CFD register bit 3 = 0
V_IN > 11V, CFD register bit 3 = 1
V_DIM = 0V
V_DIM > (V_RAMP + 0.4V) (MAX16806),
V_DIM > +3.3V (MAX16805)
0.71
0.355
V/step
176 200 224
Hz
80
2000
Hz
0.4
V
2.8
V
0
%
100
Minimum Ramp Peak
Programming Range
V_RAMP(MIN)
1.49 1.55 1.60
V
Maximum Ramp Peak
Programming Range
V_RAMP(MAX)
2.77 2.88 3.00
V
Ramp Peak Default Voltage
Ramp Peak register at factory default
(0x07)
2.88
V
Ramp Offset Voltage
MOMENTARY SWITCH INTERFACE (SW) (MAX16806)
SW Pullup Current
SW Input-Voltage High
I_SW
V_SW = 0V
V_IH
I_SW = 100µA
SW Input-Voltage Low
V_IL
Minimum Pulse Width
Minimum Debounce Time
210
mV
1
3
mA
4
V
0.4
V
120
ms
40
ms
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