MAX16802BEVKIT Maxim Integrated Products, MAX16802BEVKIT Datasheet - Page 6

• Manufacturer Part Number: MAX16802BEVKIT
• Description: EVAL KIT FOR MAX16802
• Manufacturer: Maxim Integrated Products

Specifications of MAX16802BEVKIT

• Current - Output / Channel: 750mA
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 12V
• Features: Dimmable
• Voltage - Input: 10.8 ~ 30V
• Utilized Ic / Part: MAX16802B
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The MAX16801/MAX16802 family of devices is intend-
ed for constant current drive of high-brightness (HB)
LEDs used in general lighting and display applications.
They are specifically designed for use in isolated and
nonisolated circuit topologies such as buck, boost, fly-
back, and SEPIC, operating in continuous or discontin-
uous mode. Current mode control is implemented with
an internally trimmed, fixed 262kHz switching frequen-
cy. A bootstrap UVLO with a large hysteresis (11.9V),
very low startup current, and low operating current
Offline and DC-DC PWM Controllers for
High-Brightness LED Drivers
6
(V
UVLO/EN
PIN
_______________________________________________________________________________________
1
2
3
4
5
6
7
8
= +1.4V, V
UVLO/EN
DIM/FB
NAME
COMP
NDRV
GND
5.0
4.8
4.6
4.4
4.2
4.0
3.8
3.6
3.4
3.2
3.0
V
CS
IN
CC
-40
V
SOURCING 20mA
FB
IN
= 24V
-20
= +1V, COMP = unconnected, V
NDRV OUTPUT IMPEDANCE
Detailed Description
Externally Programmable Undervoltage Lockout. UVLO programs the input start voltage. Connect
UVLO to GND to disable the device.
Low-Frequency PWM Dimming Input/Error-Amplifier Inverting Input
Error-Amplifier Output. Connect the compensation components between DIM/FB and COMP in high-
accuracy LED current regulation.
Current-Sense Connection for Current Regulation. Connect to high side of sense resistor. An RC filter
may be necessary to eliminate leading-edge spikes.
Power-Supply Ground
External n-Channel MOSFET Gate Connection
Gate-Drive Supply. Internally regulated down from IN. Decouple with a 10nF or larger capacitor to GND.
IC Supply. Decouple with a 10nF or larger capacitor to GND. For bootstrapped operation (MAX16801),
connect a startup resistor from the input supply line to IN. Connect the bias winding supply to this point
(see Figure 5). For the MAX16802, connect IN directly to a +10.8V to +24V supply.
vs. TEMPERATURE
TEMPERATURE (°C)
0
20
40
60
Typical Operating Characteristics (continued)
80
CS
= 0V, T
A
result in an efficient universal-input LED driver. In addi-
tion to the internal bootstrap UVLO, these devices also
offer programmable input startup voltage programmed
through the UVLO/EN pin. The MAX16801 is well suited
for universal AC input (rectified 85VAC to 265VAC) dri-
vers. The MAX16802 is well suited for low input voltage
(10.8VDC to 24VDC) applications.
The MAX16801/MAX16802 regulate the LED current by
monitoring current through the external MOSFET cycle
by cycle.
= +25°C, unless otherwise noted.)
FUNCTION
-100
120
100
-20
-40
-60
-80
80
60
40
20
0
0.1
ERROR-AMPLIFIER OPEN-LOOP GAIN
1
AND PHASE vs. FREQUENCY
10
100
FREQUENCY (Hz)
PHASE
1k
GAIN
10k
100k
Pin Description
1M
MAX16801 toc20
10M
100M
50
30
10
-10
-30
-50
-90
-110
-130
-150
-170
-70