MAX16834_15 Datasheet, PDF (4/23 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
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
Minimum On-Time
Duty Cycle
t_ON(MIN)
On-time includes blanking time
(Note 4)
100
ns
90
99.5
%
CURRENT PEAK LIMIT COMPARATOR
Trip Threshold Voltage
0.25
0.3
0.35
V
Propagation Delay
50mV overdrive with respect to NDRV
40
ns
OVERVOLTAGE PROTECTION INPUT (OVP+)
OVP+ On Threshold Voltage
OVP+ Hysteresis
V_{OVP_ON}
1.375 1.435 1.495
V
200
mV
OVP+ Input Leakage Current
HIGH-SIDE LED SHORT COMPARATOR
Off Threshold
On Threshold
Error Reject Blankout
LOW-SIDE LED SHORT COMPARATOR
(V_OVP - V_LV) = 1.235V
V_CLV - V_LV
V_CLV - V_LV
f_OSC = 500kHz
-1
+1
μA
4.0
4.3
4.6
V
4.1
4.4
4.7
V
256
μs
Off Threshold
0.27 0.30 0.33
V
Error Reject Blankout
5
μs
HICCUP TIMER
Hiccup Time
GATE-DRIVER OUTPUT (NDRV)
f_OSC = 500kHz
8.2
ms
NDRV Peak Pullup Current
NDRV Peak Pulldown Current
p-Channel MOSFET R_DSON
n-Channel MOSFET R_DSON
DIMOUT
V_CC = 7V
V_CC = 7V
(V_CC - V_NDRV) = 0.1V
V_NDRV = 0.1V
3
A
3
A
1.2
1.9
Ω
0.9
1.7
Ω
DIMOUT Peak Pullup Current
DIMOUT Peak Pulldown Current
p-Channel MOSFET R_DSON
n-Channel MOSFET R_DSON
(V_CLV - V_LV) = 5V
(V_CLV - V_LV) = 5V
(V_CLV - V_DIMOUT) = 0.1V
(V_DIMOUT - V_LV) = 0.1V
25
50
mA
25
50
mA
31
Ω
25
Ω
PWMDIM to DIMOUT
Propagation Delay
FAULT FLAG (FLT)
FLT Pulldown Current
FLT Leakage Current
Thermal Warning On Threshold
V_FLT = 0.2V
V_FLT = 1.0V
200
ns
2
5
10
mA
1
μA
+140
°C
Thermal Warning Threshold
Hysteresis
20
°C
Note 2: Dropout voltage is defined as V_IN - V_CC, when V_CC is 100mV below the value of V_CC for V_IN = 9.5V.
Note 3: Dropout is defined as V_HV - V_CLV, when V_CLV is 100mV below the value of V_CLV for V_HV = 8V.
Note 4: Not production tested. Guaranteed by design.
www.maximintegrated.com
Maxim Integrated | 4