MAX16834 Maxim Integrated Products, MAX16834 Datasheet - Page 6

• Manufacturer Part Number: MAX16834
• Description: High-Power LED Driver
• Manufacturer: Maxim Integrated Products

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High-Power LED Driver with Integrated High-Side LED
Current Sense and PWM Dimming MOSFET Driver
(V
R
6
RT
TQFN
IN
_______________________________________________________________________________________
1
2
3
4
5
6
= 10kΩ, T
= V
PIN
HV
TSSOP
= 12V, V
7.02
7.20
7.18
7.16
7.14
7.12
7.10
7.08
7.06
7.04
7.00
5.50
5.00
4.50
4.00
3.50
3.00
2.50
2.00
1.50
1.00
0.50
3
4
5
6
7
8
A
0
= +25°C, unless otherwise noted.)
6
0
V
T
IN
0.5
A
= 12V
= +125°C
UVEN
NAME
COMP
SGND
OVP+
10
REFI
REF
1.0 1.5 2.0 2.5
SC
= 5V, V
14
V
V
CLV
CC
T
I
A
CLV
V
LED-String Overvoltage Protection Input. Connect a resistive voltage-divider between the positive
output, OVP+, and LV to set the overvoltage threshold. OVP+ has a 1.435V threshold voltage with a
200mV hysteresis.
Signal Ground
Error-Amplifier Output. Connect an RC network from COMP to SGND for stable operation. See the
Feedback Compensation section.
3.7V Reference Output Voltage. Bypass REF to SGND with a 0.1µF to 0.22µF ceramic capacitor.
Current Reference Input. V
the LED current.
Current-Mode Slope Compensation Setting. Connect to an appropriate external capacitor from SC
to SGND to generate a ramp signal for stable operation.
= +25°C
IN
vs. V
vs. I
(mA)
(V)
18
LV
3.0 3.5
CLV
IN
= V
22
T
A
4.0
= -40°C
PWMDIM
4.5
26
Typical Operating Characteristics (continued)
5.0
= SGND, C
REFI
provides a reference voltage for the current-sense amplifier to set
VCC
= 4.7µF, C
FUNCTION
LCV
5.10
5.09
5.08
5.07
5.06
5.05
5.04
5.03
5.02
5.01
5.00
50
40
30
20
10
0
= 100nF, C
6
0
V
IN
1
= 12V
10
2
NDRV RISE/FALL TIME
vs. CAPACITANCE
3
CAPACITANCE (nF)
V
14
REF
RISE TIME
CLV
4
V
HV
vs. V
= 100nF, R
5
(V)
Pin Description
18
6
HV
FALL TIME
7
22
V
IN
8
= 12V
SENSE+
26
9
10
= 0.1Ω,