Operating Temperature Range .........................-40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) ........…………………+300°C
Soldering Temperature (reflow) .......................................+260°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Electrical Characteristics
(V
IN
= 12V, R19 = 2kΩ, C33 = 2200pF, R17 = 1.27kΩ, C
DL_
= 0.01μF, T
J
= -40°C to +125°C, unless otherwise noted. Typical values
are at T
A
= +25°C.) (Note 1)
PARAMETER
Power-Supply Voltage
Quiescent Current
Shutdown Current
Standby Current
I
2
C-COMPATIBLE I/O (SCL, SDA)
Input High Voltage
Input Low Voltage
Input Hysteresis
Input High Leakage Current
Input Low Leakage Current
Input Capacitance
Output Low Voltage
Output High Current
I
2
C-COMPATIBLE TIMING
Serial Clock (SCL) Frequency
BUS Free Time Between STOP
and START Conditions
START Condition Hold Time
STOP Condition Setup Time
Clock Low Period
Clock High Period
Data Setup Time
Data In Hold Time
Data Out Hold Time
f
SCL
t
BUF
t
HD:STA
t
SU:STO
t
LOW
t
HIGH
t
SU:DAT
t
HD:DATIN
t
HD:DATOUT
1.3
0.6
0.6
1.3
0.6
0.3
0.03
0.3
0.9
400
kHz
μs
μs
μs
μs
μs
μs
μs
μs
V
IH
V
IL
V
HYS
I
IH
I
IL
C
IN
V
OL
I
OH
I
OL
= 3mA
V
OH
= 5V
V
LOGIC
= 5V
V
LOGIC
= 0V
-1
-1
10
0.4
1
25
+1
+1
1.5
0.5
V
V
mV
μA
μA
pF
V
μA
SYMBOL
V
IN
I
IN
I
IN,SD
I
IN,SB
V
SYNC
= 3V
DL_ = unconnected; R19, C33 = open
V
SYNC
= 0V
I
2
C standby activated
CONDITIONS
MIN
4.75
5
20
3
TYP
MAX
24
10
75
UNITS
V
mA
μA
mA
www.maximintegrated.com
Maxim Integrated | 2
MAX16826
Programmable, Four-String HB
LED Driver with Output-Voltage
Optimization and Fault Detection
Electrical Characteristics (continued)
(V
IN
= 12V, R19 = 2kΩ, C33 = 2200pF, R17 = 1.27kΩ, C
DL_
= 0.01μF, T
J
= -40°C to +125°C, unless otherwise noted. Typical values
are at T
A
= +25°C.) (Note 1)
PARAMETER
Maximum Receive SCL/SDA Rise
Time
Minimum Receive SCL/SDA Rise
Time
Maximum Receive SCL/SDA Fall
Time
Minimum Receive SCL/SDA Fall
Time
Transmit SDA Fall Time
Pulse Width of Suppressed Spike
INTERNAL REGULATORS (IN, V
CC
)
V
CC
Output Voltage
V
CC
Undervoltage Lockout
V
CC
Undervoltage Lockout
Hysteresis
IN Shunt Regulation Voltage
PWM GATE DRIVER (DL)
Peak Source Current
Peak Sink Current
DL High-Side Driver Resistance
DL Low-Side Driver Resistance
Minimum DL Pulse Width
PWM CONTROLLER, SOFT-START (FB, COMP, OVP)
FB Voltage Maximum
FB Voltage Minimum
FB Voltage LSB
FB Input Bias Current
Feedback-Voltage Line
Regulation
Soft-Start Current
OVP Input Bias Current
Slope Compensation
I
SS
I
OVP
I
SLOPE
I
FB
V
FB,MAX
V
FB,MIN
FB shorted to COMP; MAX16826 only
FB shorted to COMP; MAX16826B only
FB shorted to COMP; MAX16826 only
FB shorted to COMP; MAX16826B only
FB shorted to COMP; MAX16826 only
FB shorted to COMP; MAX16826B only
0V < V
FB
< 5.5V
Level to produce V
COMP
= 1.25V,
4.5V < V
VCC
< 5.5V
V
CSS
= 0.5V
VCC
0V < V
OVP
< 5.5V
3.2
-100
19
6.0
0
26
-100
1.230
1.23
862
735
1.250
1.25
876
750
2.94
3.9
0
+100
±0.25
10.4
+100
32
1.260
1.27
885
765
V
mV
mV
nA
%/V
μA
nA
μA/μs
I
DL
= -100mA
I
DL
= +100mA
2
2
2.25
1.30
40
A
A
Ω
Ω
ns
V
VCC
V
VCC_UVLO
V
VCC_HYS
I
IN
= 250mA
0V < I
VCC
< 30mA (Note 2),
4.75V < V
IN
< 24V, DL, DL1 to DL4
unconnected
V
CC
rising
135
24.05
175
26.0
4.5
5.25
5.65
4.5
205
27.5
V
V
mV
V
SYMBOL
t
R
t
R
t
F
t
F
t
F
t
SP
C
B
= 400pF
C
B
= 400pF
C
B
= 400pF
C
B
= 400pF
C
B
= 400pF, I
O
= 3mA
60
50
CONDITIONS
MIN
TYP
300
60
300
60
250
MAX
UNITS
ns
ns
ns
ns
ns
ns
www.maximintegrated.com
Maxim Integrated | 3
MAX16826
Programmable, Four-String HB
LED Driver with Output-Voltage
Optimization and Fault Detection
Electrical Characteristics (continued)
(V
IN
= 12V, R19 = 2kΩ, C33 = 2200pF, R17 = 1.27kΩ, C
DL_
= 0.01μF, T
J
= -40°C to +125°C, unless otherwise noted. Typical values
are at T
A
= +25°C.) (Note 1)
PARAMETER
ERROR AMPLIFIER (FB, COMP)
Open-Loop Gain
Unity-Gain Bandwidth
Phase Margin
Error-Amplifier Output Current
COMP Clamp Voltage
COMP Short-Circuit Current
PWM CURRENT LIMIT (CS)
Cycle-by-Cycle Current-Limit
Threshold
Cycle-by-Cycle Current-Limit
Propagation Time To DL
Gross Current-Limit Threshold
Gross Current-Limit Propagation
Time To DL
Input Bias Current
PWM OSCILLATOR (RTCT)
RTCT Voltage Ramp (Peak to
Peak)
RTCT Voltage Ramp Valley
Discharge Current
Frequency Range
SYNCHRONIZATION (SYNC/ENABLE)
Input Rise/Fall Time
Input Frequency Range
Input High Voltage
Input Low Voltage
Input Minimum Pulse Width
Input Bias Current
Delay to Shutdown
LED DIMMING (DIM1–DIM4)
Input High Voltage
Input Low Voltage
Minimum Dimming Frequency
Input Bias Current
V
DIM,MAX
V
DIM,MIN
f
DIM
I
DIM
t
ON
= 2μs (Note 3)
0V < V
DIM_
< 5.5V
45
-100
0
+100
1.5
0.5
V
V
Hz
nA
0V < V
SYNC
< 5.5V
V
SYNC
= 0V
200
-100
13
0
32
+100
65
100
1.5
0.5
200
1000
ns
kHz
V
V
ns
nA
μs
V
RAMP
V
RAMP_VALLEY
I
DIS
f
OSC
5.5V < V
IN
< 24V
5.5V < V
IN
< 24V
V
RTCT
= 2V
5.5V < V
IN
< 24V
1.60
1.11
7.8
100
1.65
1.20
8.4
1.80
1.27
9.1
1000
V
V
mA
kHz
V
CL
t
PROP, CL
V
GCL
t
PROP,GCL
V
DL
= 0V
10mV overdrive
V
CSS
= 0V
10mV overdrive
0V < V
CS
< 5.5V
-100
250
187
200
80
270
80
0
+100
280
217
mV
ns
mV
ns
nA
A
OL
BW
PM
I
COMP
V
COMP
I
COMP_SC
Sourcing, V
COMP
= 3V
Sinking, V
COMP
= 2V
V
FB
= 0V
3.25
12
80
2
65
1.9
0.9
4.5
dB
MHz
Degrees
mA
V
mA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
www.maximintegrated.com
Maxim Integrated | 4
MAX16826
Programmable, Four-String HB
LED Driver with Output-Voltage
Optimization and Fault Detection
Electrical Characteristics (continued)
(V
IN
= 12V, R19 = 2kΩ, C33 = 2200pF, R17 = 1.27kΩ, C
DL_
= 0.01μF, T
J
= -40°C to +125°C, unless otherwise noted. Typical values
are at T
A
= +25°C.) (Note 1)
PARAMETER
ADC (DR1–DR4, OVP)
Maximum Error
ADC Single Bit Acquisition
Latency
DR Channel Sample Time
OVP Channel Sample Time
Full-Scale Input Voltage
Least Significant Bit
DR Input Bias Current
Drain Fault Comparator
Threshold
Drain Fault Comparator Delay
Transconductance
Maximum Output Current
CS1–CS4 Input Bias Current
CS1–CS4 Regulation Voltage
Maximum
t
DR,SMPL
t
OVP,SMPL
V
FS
V
LSB
I
DR
0V < V
DR_
< 5.5V
-100
1.215
E
MAX
(Note 4)
2
190
20
1.24
9.76
0
+100
1.2550
±50
mV
μs
ms
μs
V
mV
nA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DRAIN FAULT COMPARATORS (DR1–DR4) (Shorted LED String Comparator)
V
DFTH
t
DFD
Gm
I
DL
I
CS
Voltage to drive DL1–DL4 low
10mV overdrive
ΔI
= -500μA
Sourcing or sinking
0V < V
CS
< 5.5V
CS_ = DL_, FB DAC full scale;
MAX16826 only
V
CS,MAX
CS_ = DL_, FB DAC full scale;
MAX16826B only
CS_ = DL_, FB DAC minus full scale;
MAX16826 only
CS_ = DL_, FB DAC minus full scale;
MAX16826B only
CS_ = DL_, FB DAC 1-bit transition
-100
306
308
90
90
1.4
1.52
1
75
15
0
316
318
97
99
1.72
+100
324
mV
328
105
mV
109
mV
1.63
V
μs
mS
mA
nA
LINEAR REGULATORS (DL1–DL4, CS1–CS4)
CS1–CS4 Regulation Voltage
Minimum
CS1–CS4 Regulation Voltage LSB
V
CS,MIN
V
CS,LSB
All devices are 100% production tested at T
J
= +25°C and T
J
= +125°C. Limits to -40°C are guaranteed by design.
I
CC
includes the internal bias currents and the current used by the gate drivers to drive DL, DL1, DL2, DL3, and DL4.
Minimum frequency to allow the internal ADC to complete at least one measurement. t
ON
is the on-time with the LED current
in regulation.
Note 4:
Minimum LED current pulse duration, which is required to correctly acquire 1 bit.
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