MAX16834_15 Datasheet, PDF (2/23 Pages) Maxim Integrated Products – High-Power LED Driver with Integrated High-Side LED Current Sense and PWM Dimming MOSFET Driver

MAX16834
High-Power LED Driver with Integrated
High-Side LED Current Sense and
PWM Dimming MOSFET Driver
Absolute Maximum Ratings
IN, HV, LV to SGND................................................-0.3V to +30V
OVP+, SENSE+, DIMOUT, CLV to SGND ..............-0.3V to +30V
SENSE+ to LV........................................................-0.3V to +0.3V
HV, IN to LV ............................................................-0.3V to +30V
OVP+, CLV, DIMOUT to LV ......................................-0.3V to +6V
PGND to SGND .....................................................-0.3V to +0.3V
V_CC to SGND..........................................................-0.3V to +12V
NDRV to PGND...........................................-0.3V to (V_CC + 0.3V)
All Other Pins to SGND.............................................-0.3V to +6V
NDRV Continuous Current................................................±50mA
DIMOUT Continuous Current..............................................±2mA
V_CC Short-Circuit Current to SGND Duration ...........................1s
Continuous Power Dissipation (T_A = +70°C)
QFN, TQFN (derate 25.6mW/°C* above +70°C).........2051mW
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
*As per JEDEC51 standard (multilayer board).
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)
Junction-to-Ambient Thermal Resistance (θ_JA)
QFN, TQFN ........................................................................39°C/W
TSSOP .............................................................................37.7°C/W
Junction-to-Case Thermal Resistance (θ_JC)
QFN, TQFN .....................................................................6°C/W
TSSOP .............................................................................2°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_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 Voltage Range
V_IN
4.75
28
V
Quiescent Supply Current
Shutdown Supply Current
I_Q
I_SHDN
Excluding I_LED
V_UVEN = 0V
6
10
mA
30
60
μA
INTERNAL LINEAR REGULATOR (V_CC)
Output Voltage
V_CC
0 ≤ I_CC ≤ 50mA, 9.5V ≤ V_IN ≤ 28V
6.3
7
7.7
V
Dropout Voltage
Short-Circuit Current
V_DO
I_CC = 35mA (Note 2)
V_CC = 0V, V_IN = 12V
0.65
1
V
80
300
mA
LINEAR REGULATOR (CLV)
Output Voltage
(V_{CLV -} V_LV)
0 ≤ I_CLV ≤ 2mA, 6V ≤ V_HV ≤ 28V,
6V ≤ V_(HV-LV) ≤ 22V
4.7
5
5.3
V
Dropout Voltage
V_DO
I_CLV = 2mA, 0 ≤ V_LV ≤ 23.3V (Note 3)
Short-Circuit Current
V_CLV = 12V, V_IN = 12V, V_HV = 24V
2.2
REFERENCE VOLTAGE (REF)
0.5
V
10
mA
Output Voltage
V_REF
0 ≤ I_REF ≤ 1mA, 4.75V ≤ V_IN ≤ 28V
3.625 3.70 3.775
V
REF Short-Circuit Current
V_REF = 0V
30
mA
UNDERVOLTAGE LOCKOUT/ENABLE INPUT (UVEN)
UVEN On Threshold Voltage
V_{UVEN_THUP}
1.395 1.435 1.475
V
UVEN Threshold Voltage
Hysteresis
200
mV
Input Leakage Current
I_LEAK
V_UVEN = 0V
1
μA
PWMDIM
PWMDIM On Threshold Voltage
V_PWMDIM
1.395 1.435 1.475
V
www.maximintegrated.com
Maxim Integrated | 2