MAXIM INTEGRATED CONFIDENTIAL/DISTRIBUTE ONLY UNDER NDA
EVALUATION KIT AVAILABLE
MAX16813
Integrated, 4-Channel, High-Brightness
LED Driver with High-Voltage DC-DC Controller
and Battery Disconnect
Benefits and Features
General Description
The MAX16813 high-efficiency, high-brightness LED (HB
LED) driver provides four integrated LED current-sink
channels. An integrated current-mode switching control-
ler drives a DC-DC converter that provides the neces-
sary voltage to multiple strings of HB LEDs. The device
accepts a wide 4.75V to 40V input voltage range and
withstands direct automotive load-dump events. The
wide input range allows powering HB LEDs for small- to
medium-sized LCD displays in automotive and general
lighting applications.
An internal current-mode switching DC-DC controller
supports boost or SEPIC topologies and operates in an
adjustable frequency range between 200kHz and 2MHz.
An integrated spread-spectrum mode helps reduce EMI.
Current-mode control with programmable slope compen-
sation provides fast response and simplifies loop compen-
sation. An adaptive output-voltage control scheme mini-
mizes power dissipation in the LED current-sink paths.
The device has a separate p-channel drive (PGATE) pin
that is used for output undervoltage protection. Whenever
the output falls below the threshold, the external
p-MOSFET is latched off, disconnecting the input source.
Cycling the EN or the input supply is required to restart
the converter. The external p-MOSFET is off when the EN
pin is below 0.3V (typ). The shutdown current is 1µA (typ)
at an input voltage of 12V.
The device consists of four identical linear current-sink
channels, adjustable from 20mA to 150mA with an
accuracy of ±3% using a single external resistor. Multiple
channels can be connected in parallel to achieve higher
current per LED string. The device also features a unique
pulsed dimming control through a logic input (DIM),
with minimum pulse width as low as 500ns. Protection
features include output overvoltage, open-LED detection
and protection, programmable shorted LED detection and
protection, output undervoltage protection and detection,
and overtemperature protection. The device operates
over the -40°C to +125°C automotive temperature range.
The MAX16813 is available in 20-pin (6.5mm x 4.4mm)
TSSOP and 20-pin (4mm x 4mm) TQFN packages.
● 4-Channel Linear LED Current Sinks with Internal
MOSFETs Independently Drive Multiple LED Strings
• Full-Scale LED Current Adjustable from 20mA
to 150mA
• Drives 1 to 4 LED Strings
• 10000:1 PWM Dimming at 200Hz
● Flexible Current-Mode Architecture Supports a Wide
Range of Applications While Minimizing Interference
• Boost or SEPIC Current-Mode DC-DC Controller
• 200kHz to 2MHz Programmable Switching
Frequency
• External Switching-Frequency Synchronization
• Spread-Spectrum Mode
● Protection Features Enhance Fault Detection and
System Reliability
• Output-to-Ground Undervoltage Protection
• Open-Drain Fault-Indicator Output
• Open-LED and LED-Short Detection and
Protection
• Overtemperature Protection
● Adaptive Output-Voltage Optimization to Minimize
Power Dissipation
• Less than 2µA Shutdown Current
Applications
●
●
●
●
Automotive Displays LED Backlights
Automotive RCL, DRL, Front Position, and Fog Lights
LCD TV and Desktop Display LED Backlights
Architectural, Industrial, and Ambient Lighting
Ordering Information
PART
MAX16813ATP+
MAX16813ATP/V+
MAX16813AUP+
MAX16813AUP/V+
TEMP RANGE
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
PIN-PACKAGE
20 TQFN-EP*
20 TQFN-EP*
20 TSSOP-EP*
20 TSSOP-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP
= Exposed pad.
/V denotes an automotive qualified part.
19-6713; Rev 4; 3/16
MAXIM INTEGRATED CONFIDENTIAL/DISTRIBUTE ONLY UNDER NDA
MAX16813
Integrated, 4-Channel, High-Brightness
LED Driver with High-Voltage DC-DC Controller
and Battery Disconnect
OUT_ Continuous Current..............................................±175mA
V
CC
Short-Circuit Duration ........................................Continuous
Continuous Power Dissipation (T
A
= +70°C) (Note 1)
20-Pin TQFN (derate 25.6mW/°C above +70°C) ......2051mW
20-Pin TSSOP (derate 26.5mW/°C above +70°C) ....2122mW
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
Absolute Maximum Ratings
IN to SGND ...........................................................-0.3V to +45V
EN, PGATE to SGND ...................................-0.3V to (IN + 0.3V)
PGND to SGND....................................................-0.3V to +0.3V
LEDGND to SGND ...............................................-0.3V to +0.3V
OUT_ to LEDGND .................................................-0.3V to +45V
V
CC
to SGND ............ -0.3V to the lower of (IN + 0.3V) and +6V
FLT,
DIM, RSDT, OVP to SGND .............................-0.3V to +6V
CS, NDRV, RT, COMP, SETI to SGND .... -0.3V to (V
CC
+ 0.3V)
NDRV Peak Current (< 100ns) .............................................±3A
NDRV Continuous Current .............................................±100mA
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.
Package Thermal Characteristics
(Note 1)
TQFN
Junction-to-Ambient Thermal Resistance (θ
JA
) ........+39°C/W
Junction-to-Case Thermal Resistance (θ
JC
) ...............+6°C/W
TSSOP
Junction-to-Ambient Thermal Resistance (θ
JA
) .....+37.7°C/W
Junction-to-Case Thermal Resistance (θ
JC
) ............+2.0°C/W
Note 1:
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to
www.maximintegrated.com/thermal-tutorial.
Electrical Characteristics
(V
IN
= V
EN
= 12V, R
RT
= 12.25kΩ, R
SETI
= 15kΩ, C
VCC
= 1µF, NDRV = COMP = OUT_ = PGATE = unconnected, V
RSDT
= V
DIM
=
V
CC
, V
OVP
= 0.7V, V
CS
= V
LEDGND
= V
PGND
= V
SGND
= 0V, T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical values are
at T
A
= +25°C.) (Note 2)
PARAMETER
SUPPLIES
Operating Voltage Range
Supply Current
Standby Supply Current
IN Undervoltage Lockout
IN UVLO Hysteresis
V
CC
REGULATOR
Regulator Output Voltage
Dropout Voltage
Short-Circuit Current Limit
V
CC
Undervoltage-Lockout
Threshold
V
CC
UVLO Hysteresis
V
CC_ILIM
V
CC
6.5V < V
IN
< 10V, 1mA < I
LOAD
< 50mA
10V < V
IN
< 40V, 1mA < I
LOAD
< 10mA
V
IN
- V
CC
, V
IN
= 4.75V, I
LOAD
= 50mA
V
CC
shorted to SGND
V
CC
rising
4.75
4.75
5
5
200
100
4
125
5.25
5.25
500
V
mV
mA
V
mV
V
IN
I
IN
I
IN_Shdn
V
OVP
= 1.266V, all channels on,
V
OUT_
= 0.5V
V
EN
= 0V
V
IN
rising
3.975
4.75
3.4
1
4.3
170
40
5.7
2
4.625
V
mA
µA
V
mV
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
www.maximintegrated.com
Maxim Integrated │ 2
MAXIM INTEGRATED CONFIDENTIAL/DISTRIBUTE ONLY UNDER NDA
MAX16813
Integrated, 4-Channel, High-Brightness
LED Driver with High-Voltage DC-DC Controller
and Battery Disconnect
Electrical Characteristics (continued)
(V
IN
= V
EN
= 12V, R
RT
= 12.25kΩ, R
SETI
= 15kΩ, C
VCC
= 1µF, NDRV = COMP = OUT_ = PGATE = unconnected, V
RSDT
= V
DIM
=
V
CC
, V
OVP
= 0.7V, V
CS
= V
LEDGND
= V
PGND
= V
SGND
= 0V, T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical values are
at T
A
= +25°C.) (Note 2)
PARAMETER
RT OSCILLATOR
Switching Frequency Range
Maximum Duty Cycle
Oscillator Frequency Accuracy
Frequency Dither
Sync Rising Threshold
Minimum Sync Frequency
PWM COMPARATOR
PWM Comparator Leading-Edge
Blanking
PWM-to-NDRV Propagation
Delay
SLOPE COMPENSATION
Peak Slope Compensation
Current Ramp Magnitude
CURRENT-SENSE COMPARATOR
Current-Limit Threshold
CS Limit Comparator to NDRV
Propagation Delay
ERROR AMPLIFIER
OUT_ Regulation Voltage
Transconductance
No-Load Gain
COMP Sink Current
COMP Source Current
MOSFET DRIVER
NDRV On-Resistance
Peak Sink Current
Peak Source Current
Rise Time
Fall Time
I
SINK
= 100mA (nMOS)
I
SOURCE
= 50mA (pMOS)
V
NDRV
= 5V
V
NDRV
= 0V
C
LOAD
= 1nF
C
LOAD
= 1nF
0.9
1.1
2
2
6
6
Ω
Ω
A
A
ns
ns
g
M
V
COMP
= 2V
(Note 4)
V
OUT_
= 2.25V, V
COMP
= 2V
V
OUT_
= 0V, V
COMP
= 1.0V
160
160
340
1
600
75
375
375
800
800
880
V
µS
dB
µA
µA
(Note 3)
10mV overdrive, excluding leading edge
blanking time
396
416
10
437
mV
ns
Current ramp added to the CS input
45
50
55
µA
Including leading-edge blanking time
60
90
ns
ns
f
DITH
f
SW
Frequency dithering disabled
f
SW
= 200kHz to 600kHz
f
SW
= 600kHz to 2000kHz
f
SW
= 200kHz to 2000kHz, frequency dither
disabled
Dither enabled, f
SW
= from 200kHz to
2000kHz
200
90
86
-7.5
-5
4
1.1f
SW
-7
94.5
90.5
2000
98.5
95
+7.5
-9
kHz
%
%
%
V
kHz
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
www.maximintegrated.com
Maxim Integrated │ 3
MAXIM INTEGRATED CONFIDENTIAL/DISTRIBUTE ONLY UNDER NDA
MAX16813
Integrated, 4-Channel, High-Brightness
LED Driver with High-Voltage DC-DC Controller
and Battery Disconnect
Electrical Characteristics (continued)
(V
IN
= V
EN
= 12V, R
RT
= 12.25kΩ, R
SETI
= 15kΩ, C
VCC
= 1µF, NDRV = COMP = OUT_ = PGATE = unconnected, V
RSDT
= V
DIM
=
V
CC
, V
OVP
= 0.7V, V
CS
= V
LEDGND
= V
PGND
= V
SGND
= 0V, T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical values are
at T
A
= +25°C.) (Note 2)
PARAMETER
LED CURRENT SOURCE
OUT_ Current Sink Range
Channel-to-Channel Matching
I
OUT_
= 100mA
R
SETI
= 30kΩ, T
A
= +25°C
R
SETI
= 30kΩ, T
A
= -40°C to +125°C
OUT_ Current
R
SETI
= 15kΩ, T
A
= +25°C
R
SETI
= 15kΩ, T
A
= -40°C to +125°C
R
SETI
= 10kΩ, T
A
= +25°C
R
SETI
= 10kΩ, T
A
= -40°C to +125°C
OUT_ Leakage Current
LOGIC INPUTS and OUTPUTS
EN Input Logic-High
EN Input Logic-Low
EN Hysteresis
EN Input Current
DIM Input Logic-High
DIM Input Logic-Low
DIM Hysteresis
DIM Input Current
DIM to LED Turn-On Delay
DIM to LED Turn-Off Delay
I
OUT_
Rise Time
I
OUT_
Fall Time
FLT
Output Low Voltage
FLT
Output Leakage Current
LED Short-Detection Threshold
Short-Detection Comparator
Delay
RSDT Leakage Current
OVP Trip Threshold
OVP Hysteresis
OVP Leakage Current
V
OVP
= 1.25V
-200
V
RSDT
= 2.5V
OVP rising
-600
1.190
1.228
70
+200
V
DIM
= 5V
DIM rising edge to 10% rise in I
OUT_
DIM falling edge to 10% fall in I
OUT_
10% to 90% I
OUT_
90% to 10% I
OUT_
V
IN
= 4.75V and I
SINK
= 5mA
V
FLT
= 5.5V
V
RSDT
= 2V
-1
6.1
7
6.5
+600
1.266
-2
150
50
200
50
0.4
+1
7.9
250
+2
V
EN
= 12V
V
EN
= 0.3V
2.1
0.8
260
7.5
100
15
200
2.1
0.4
V
V
mV
µA
nA
V
V
mV
µA
ns
ns
ns
ns
V
µA
V
µs
nA
V
mV
nA
V
DIM
= 0V, V
OUT_
= 40V
20
-2
48.25
47.50
97
96
145.50
144
-2
50
50
100
100
150
150
150
+2
51.75
52.50
103
104
154.50
156
+2
µA
mA
mA
%
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
www.maximintegrated.com
Maxim Integrated │ 4
MAXIM INTEGRATED CONFIDENTIAL/DISTRIBUTE ONLY UNDER NDA
MAX16813
Integrated, 4-Channel, High-Brightness
LED Driver with High-Voltage DC-DC Controller
and Battery Disconnect
Electrical Characteristics (continued)
(V
IN
= V
EN
= 12V, R
RT
= 12.25kΩ, R
SETI
= 15kΩ, C
VCC
= 1µF, NDRV = COMP = OUT_ = PGATE = unconnected, V
RSDT
= V
DIM
=
V
CC
, V
OVP
= 0.7V, V
CS
= V
LEDGND
= V
PGND
= V
SGND
= 0V, T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical values are
at T
A
= +25°C.) (Note 2)
PARAMETER
OVP Undervoltage-Detection
Threshold
OVP Undervoltage-Detection
Delay
Thermal-Shutdown Threshold
Thermal-Shutdown Hysteresis
PGATE DRIVER
PGATE On-Resistance
PGATE Soft-Start Current
PGATE Soft-Start Time
PGATE Leakage Current
R
PGATE
I
PGATE
= 10mA
Active during PGATE soft-start time
210
6.35
100
350
10
250
490
13.25
1
Ω
µA
ms
µA
SYMBOL
CONDITIONS
OVP falling, PGATE latched off
OVP falling
Temperature rising
MIN
0.485
5
TYP
0.585
10
165
15
MAX
0.685
20
UNITS
V
µs
°C
°C
V
PGATE
= 12V, V
EN
= 0V
0.01
Note 2:
100% tested at T
A
= +25°C. All limits over temperature are guaranteed by design, not production tested.
Note 3:
CS threshold includes slope compensation ramp magnitude.
Note 4:
Gain = dV
COMP
/dV
CS
, 0.05V < V
CS
< 0.15V.
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