MAX16833EVKIT+ Maxim Integrated Products, MAX16833EVKIT+ Datasheet - Page 8

• Manufacturer Part Number: MAX16833EVKIT+
• Description: KIT EVAL FOR MAX16833 LED DRIVER
• Manufacturer: Maxim Integrated Products

Specifications of MAX16833EVKIT+

• Current - Output / Channel: 1A
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 3 ~ 36 V
• Features: Analog Brightness control
• Voltage - Input: 5 ~ 18 V
• Utilized Ic / Part: MAX16833A/B
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

High-Voltage HB LED Drivers with
Integrated High-Side Current Sense
8
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PIN
10
11
12
13
14
15
16
—
1
2
3
4
5
6
7
8
9
(MAX16833B/
MAX16833C)
MAX16833D)
(MAX16833/
RT/SYNC
PWMDIM
ISENSE+
LFRAMP
DIMOUT
ISENSE-
NAME
COMP
SGND
ICTRL
PGND
NDRV
OVP
V
REF
FLT
CS
EP
IN
CC
Low-Frequency Ramp Output. Connect a capacitor from LFRAMP to ground to program the ramp
frequency, or connect to SGND if not used. A resistor can be connected between LFRAMP and RT/
SYNC to dither the PWM switching frequency to achieve spread spectrum.
1.64V Reference Output. Connect a 1FF ceramic capacitor from REF to SGND to provide a stable
reference voltage. Connect a resistive divider from REF to ICTRL for analog dimming.
PWM Switching Frequency Programming Input. Connect a resistor (R
to set the internal clock frequency. Frequency = (7.350 x 10
Frequency = (6.929 x10
An external pulse can be applied to RT/SYNC through a coupling capacitor to synchronize the
internal clock to the external pulse frequency. The parasitic capacitance on RT/SYNC should be
minimized.
Signal Ground
Analog Dimming-Control Input. The voltage at ICTRL sets the LED current level when V
For V
Compensation Network Connection. For proper compensation, connect a suitable RC network from
COMP to ground.
Active-Low, Open-Drain Fault Indicator Output. See the Fault Indicator (FLT) section.
PWM Dimming Input. When PWMDIM is pulled low, DIMOUT is pulled high and PWM switching is
disabled. PWMDIM has an internal pullup resistor, defaulting to a high state when left unconnected.
LED String Overvoltage-Protection Input. Connect a resistive divider between ISENSE+, OVP, and
SGND. When the voltage on OVP exceeds 1.23V, a fast-acting comparator immediately stops PWM
switching. This comparator has a hysteresis of 70mV.
Active-Low External Dimming p-Channel MOSFET Gate Driver
Negative LED Current-Sense Input. A 100I resistor is recommended to be connected between
ISENSE- and the negative terminal of the LED current-sense resistor. This preserves the absolute
maximum rating of the ISENSE- pin during LED short circuit.
Positive LED Current-Sense Input. The voltage between ISENSE+ and ISENSE- is proportionally
regulated to the lesser of V
Switching Regulator Current-Sense Input. Add a resistor from CS to switching MOSFET current-sense
resistor terminal for programming slope compensation.
Power Ground
External n-channel MOSFET Gate-Driver Output
7V Low-Dropout Voltage Regulator Output. Bypass V
Positive Power-Supply Input. Bypass IN to PGND with at least a 1FF ceramic capacitor.
Exposed Pad. Connect EP to the ground plane for heatsinking. Do not use EP as the only electrical
connection to ground.
ICTRL
> 1.4V, the internal reference sets the LED current.
9
)/R
ICTRL
RT
for the MAX16833/MAX16833D.
or 1.23V.
FUNCTION
CC
to PGND with a 1FF (min) ceramic capacitor.
9
)/R
RT
for the MAX16833/MAX16833B.
RT
) from RT/SYNC to SGND
Pin Description
ICTRL
< 1.2V.