Electrical characteristics (continued) – Rainbow Electronics MAX16834 User Manual
Page 3
MAX16834
High-Power LED Driver with Integrated High-Side LED
Current Sense and PWM Dimming MOSFET Driver
_______________________________________________________________________________________
3
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
OSCILLATOR
R
RT/SYNC
= 5k
Ω
0.9
1
1.1
MHz
Oscillator Frequency
f
OSC
R
RT/SYNC
= 25k
Ω
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
50
µs
SLOPE COMPENSATION (SC)
SC Pullup Current
I
SCPU
V
SC
= 100mV
80
100
120
µA
SC Discharge Resistance
R
SCD
V
SC
= 100mV
8
Ω
REFI
REFI Input Bias Current
V
REFI
= 1V
I1I
µA
REFI Input Common-Mode Range
(Note 4)
0
2
V
SENSE+
SENSE+ Input Bias Current
(V
SENSE+
- V
LV
) = 100mV
250
µA
HIGH-SIDE LED CURRENT-SENSE AMPLIFIER (V
SENSE+
- V
LV
)
Input Offset Voltage
V
LV
> 5V, (V
SENSE+
- V
LV
) = 5mV
-2.4
0
+2.4
mV
Voltage Gain
A
V
V
LV
> 5V, (V
SENSE+
- V
LV
) = 0.2V
9.7
9.9
10.1
V/V
(V
SENSE+
- V
LV
) = 0.1V, no load
1.8
MHz
3dB Bandwidth
(V
SENSE+
- V
LV
) = 0.02V, no load
600
kHz
LOW-SIDE LED CURRENT-SENSE AMPLIFIER
Input Offset Voltage
V
LV
< 1V, (V
SENSE+
- V
LV
) = 0V
-2
0
+2
mV
Voltage Gain
A
V
V
LV
< 1V, (V
SENSE+
- V
LV
) = 0.2V
9.7
9.9
10.1
V/V
3dB Bandwidth
600
kHz
CURRENT ERROR AMPLIFIER (TRANSCONDUCTANCE AMPLIFIER)
Transconductance
g
m
V
COMP
= 2V, V
PWMDIM
= 5V
400
500
600
µS
Open-Loop DC Gain
A
V
60
dB
Input Offset Voltage
-10
0
+10
mV
COMP Voltage Range
V
COMP
(Note 4)
0.4
2.5
V
PWM COMPARATOR
Input Offset Voltage
0.6
0.65
0.70
V
Propagation Delay
t
PD
50mV overdrive
40
ns
Minimum On-Time
t
ON(MIN)
On-time includes blanking time
100
ns
Duty Cycle
(Note 4)
90
99.5
%
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= V
HV
= 12V, V
UVEN
= 5V, V
LV
= V
PWMDIM
= SGND, C
VCC
= 4.7µF, C
LCV
= 100nF, C
REF
= 100nF, R
SENSE+
= 0.1
Ω,
R
RT
= 10k
Ω, T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C.)