MAX16834_10 Datasheet, PDF (3/23 Pages) Maxim Integrated Products – High-Power LED Driver with Integrated High-Side LED Current Sense and PWM Dimming MOSFET Driver

High-Power LED Driver with Integrated High-Side LED
Current Sense and PWM Dimming MOSFET Driver
ELECTRICAL CHARACTERISTICS (continued)
(V_IN = V_HV = 12V, V_UVEN = 5V, V_LV = V_PWMDIM = V_SGND, C_VCC = 4.7µF, C_LCV = 100nF, C_REF = 100nF, R_SENSE+ = 0.1Ω,
R_RT = 10kΩ, T_A = T_J = -40°C to +125°C, unless otherwise noted. Typical values are at T_A = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Input Leakage Current
OSCILLATOR
V_PWMDIM = 0
I1I
µA
Oscillator Frequency
f_OSC
R_RT/SYNC = 5kΩ
R_RT/SYNC = 25kΩ
0.9
1
1.1
MHz
180
200
220
kHz
Oscillator Frequency Range
(Note 4)
100
1000 kHz
External Sync Input Clock High
Threshold
(Note 4)
2
V
External Sync Input Clock Low
Threshold
(Note 4)
0.4
V
External Sync Input High Pulse
Width
(Note 4)
200
ns
Maximum External Sync Period
SLOPE COMPENSATION (SC)
SC Pullup Current
I_SCPU
V_SC = 100mV
SC Discharge Resistance
R_SCD
V_SC = 100mV
REFI
REFI Input Bias Current
V_REFI = 1V
REFI Input Common-Mode Range
(Note 4)
SENSE+
SENSE+ Input Bias Current
(V_SENSE+ - V_LV) = 100mV
HIGH-SIDE LED CURRENT-SENSE AMPLIFIER (V_SENSE+ - V_LV)
Input Offset Voltage
Voltage Gain
3dB Bandwidth
V_LV > 5V, (V_SENSE+ - V_LV) = 5mV
A_V
V_LV > 5V, (V_SENSE+ - V_LV) = 0.2V
(V_SENSE+ - V_LV) = 0.1V, no load
(V_SENSE+ - V_LV) = 0.02V, no load
LOW-SIDE LED CURRENT-SENSE AMPLIFIER
Input Offset Voltage
Voltage Gain
V_LV < 1V, (V_SENSE+ - V_LV) = 0V
A_V
V_LV < 1V, (V_SENSE+ - V_LV) = 0.2V
3dB Bandwidth
CURRENT ERROR AMPLIFIER (TRANSCONDUCTANCE AMPLIFIER)
Transconductance
g_m
V_COMP = 2V, V_PWMDIM = 5V
Open-Loop DC Gain
A_V
Input Offset Voltage
COMP Voltage Range
PWM COMPARATOR
V_COMP (Note 4)
Input Offset Voltage
Propagation Delay
t_PD
50mV overdrive
50
µs
80
100
120
µA
8
Ω
I1I
µA
0
2
V
250
µA
-2.4
0
+2.4
mV
9.7
9.9
10.1
V/V
1.8
MHz
600
kHz
-2
0
+2
mV
9.7
9.9
10.1
V/V
600
kHz
400
500
600
µS
60
dB
-10
0
+10
mV
0.4
2.5
V
0.6
0.65 0.70
V
40
ns
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