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MAX16802BEUA+

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
MAX16801A/B/MAX16802A/B
Offline and DC-DC PWM Controllers for
High-Brightness LED Drivers
4 _______________________________________________________________________________________
Typical Operating Characteristics
(V
UVLO/EN
= +1.4V, V
FB
= +1V, COMP = unconnected, V
CS
= 0V, T
A
= +25°C, unless otherwise noted.)
BOOTSTRAP UVLO WAKE-UP LEVEL
vs. TEMPERATURE
MAX16801 toc01
TEMPERATURE (°C)
V
IN
(V)
6040200-20
21.35
21.40
21.45
21.50
21.55
21.60
21.30
-40 80
MAX16801 V
IN
RISING
BOOTSTRAP UVLO SHUTDOWN LEVEL
vs. TEMPERATURE
MAX16801 toc02
TEMPERATURE (°C)
V
IN
(V)
6040200-20
9.8
9.9
10.0
10.1
9.7
-40 80
MAX16801 V
IN
FALLING
UVLO/EN WAKE-UP THRESHOLD
vs. TEMPERATURE
MAX16801 toc03
TEMPERATURE (°C)
UVLO/EN (V)
6040200-20
1.255
1.260
1.265
1.270
1.275
1.280
1.250
-40 80
UVLO/EN RISING
UVLO/EN SHUTDOWN THRESHOLD
vs. TEMPERATURE
MAX16801 toc04
TEMPERATURE (°C)
UVLO/EN (V)
6040200-20
1.15
1.20
1.25
1.30
1.10
-40 80
UVLO/EN FALLING
V
IN
SUPPLY CURRENT IN UNDERVOLTAGE
LOCKOUT vs. TEMPERATURE
MAX16801 toc05
TEMPERATURE (°C)
I
START
(µA)
6040200-20
43
44
45
46
47
48
49
50
51
52
42
-40 80
V
IN
= 19V
MAX16801 WHEN IN BOOTSTRAP UVLO
MAX16802 WHEN UVLO/EN IS LOW
V
IN
SUPPLY CURRENT AFTER STARTUP
vs. TEMPERATURE
MAX16801 toc06
TEMPERATURE (°C)
I
IN
(mA)
6040200-20
1.2
1.3
1.4
1.5
1.1
-40 80
V
IN
= 24V
V
CC
REGULATOR SET POINT
vs. TEMPERATURE
MAX16801 toc07
TEMPERATURE (°C)
V
CC
(V)
6040200-20
9.3
9.5
9.4
9.7
9.6
9.8
9.2
-40 80
V
IN
= 19V
NO LOAD
NDRV OUTPUT IS NOT
SWITCHING, V
FB
= 1.5V
NDRV OUTPUT IS
SWITCHING
V
CC
REGULATOR SET POINT
vs. TEMPERATURE
MAX116801 toc08
TEMPERATURE (°C)
V
CC
(V)
6040200-20
8.2
8.5
8.6
8.4
8.3
8.8
8.7
8.9
8.1
-40 80
V
IN
= 10.8V
10mA LOAD
20mA LOAD
CURRENT-SENSE THRESHOLD
vs. TEMPERATURE
MAX16801 toc09
TEMPERATURE (°C)
CURRENT-SENSE THRESHOLD (µV)
6040200-20
275
290
295
285
280
305
300
310
270
-40 80
+3σ
-3σ
MEAN
TOTAL NUMBER OF
DEVICES = 100
MAX16801A/B/MAX16802A/B
Offline and DC-DC PWM Controllers for
High-Brightness LED Drivers
_______________________________________________________________________________________ 5
CURRENT-SENSE THRESHOLD
MAX16801 toc10
CURRENT-SENSE THRESHOLD (mV)
PERCENTAGE OF UNITS (%)
310300290280270
5
10
15
20
25
30
0
260 320
TOTAL NUMBER OF
DEVICES = 200
SWITCHING FREQUENCY
vs. TEMPERATURE
MAX16801 toc11
TEMPERATURE (°C)
SWITCHING FREQUENCY (kHz)
6040200-20
245
260
265
255
250
275
270
280
240
-40 80
+3σ
-3σ
MEAN
TOTAL NUMBER OF
DEVICES = 100
SWITCHING FREQUENCY
MAX16801 toc12
SWITCHING FREQUENCY (kHz)
PERCENTAGE OF UNITS (%)
280270260250240
5
10
15
20
25
30
0
230 290
TOTAL NUMBER OF
DEVICES = 200
PROPAGATION DELAY FROM
CURRENT-SENSE COMPARATOR INPUT
TO NDRV vs. TEMPERATURE
MAX16801 toc13
TEMPERATURE (°C)
t
PWM
(ns)
6040200-20
55
60
65
70
75
50
-40 80
UVLO/EN PROPAGATION DELAY
vs. TEMPERATURE
MAX16801 toc14
TEMPERATURE (°C)
UNDERVOLTAGE LOCKOUT DELAY (µs)
6040200-20
4
3
2
1
7
6
5
13
12
11
10
9
8
14
0
-40 80
UVLO/EN RISING
UVLO/EN FALLING
REFERENCE VOLTAGE
vs. TEMPERATURE
MAX16801 toc15
TEMPERATURE (°C)
REFERENCE VOLTAGE (V)
6040200-20
1.226
1.227
1.228
1.229
1.230
1.225
-40 80
V
IN
= 12V
INPUT CURRENT
vs. INPUT CLAMP VOLTAGE
MAX16801 toc16
INPUT VOLTAGE (V)
INPUT CURRENT (mA)
27.525.020.0 22.515.0 17.512.5
1
2
3
4
5
6
7
8
9
10
0
10.0 30.0
INPUT CLAMP VOLTAGE
vs. TEMPERATURE
MAX16801 toc17
TEMPERATURE (°C)
INPUT CLAMP VOLTAGE (V)
6040200-20
25.2
25.4
25.6
25.8
26.0
26.2
26.4
26.6
26.8
27.0
25.0
-40 80
I
IN
= 2mA
NDRV OUTPUT IMPEDANCE
vs. TEMPERATURE
MAX16801 toc18
TEMPERATURE (°C)
R
ON
(Ω)
6040200-20
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
1.2
-40 80
V
IN
= 24V
SINKING 100mA
Typical Operating Characteristics (continued)
(V
UVLO/EN
= +1.4V, V
FB
= +1V, COMP = unconnected, V
CS
= 0V, T
A
= +25°C, unless otherwise noted.)
MAX16801A/B/MAX16802A/B
Detailed Description
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
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.
Offline and DC-DC PWM Controllers for
High-Brightness LED Drivers
6 _______________________________________________________________________________________
Pin Description
NDRV OUTPUT IMPEDANCE
vs. TEMPERATURE
MAX16801 toc19
TEMPERATURE (°C)
R
ON
(Ω)
6040200-20
3.2
3.4
3.6
3.8
4.0
4.2
4.4
4.6
4.8
5.0
3.0
-40 80
V
IN
= 24V
SOURCING 20mA
ERROR-AMPLIFIER OPEN-LOOP GAIN
AND PHASE vs. FREQUENCY
MAX16801 toc20
FREQUENCY (Hz)
GAIN (dB)
10M1M10k1k 100k10 1001
-80
-60
-20
-40
0 -70
20
60
40
80
100
120
-100
PHASE (DEGREES)
-150
-130
-90
-110
-50
-10
-30
10
30
50
-170
0.1 100M
GAIN
PHASE
Typical Operating Characteristics (continued)
(V
UVLO/EN
= +1.4V, V
FB
= +1V, COMP = unconnected, V
CS
= 0V, T
A
= +25°C, unless otherwise noted.)
PIN NAME FUNCTION
1 UVLO/EN
Externally Programmable Undervoltage Lockout. UVLO programs the input start voltage. Connect
UVLO to GND to disable the device.
2 DIM/FB Low-Frequency PWM Dimming Input/Error-Amplifier Inverting Input
3 COMP
Error-Amplifier Output. Connect the compensation components between DIM/FB and COMP in high-
accuracy LED current regulation.
4CS
Current-Sense Connection for Current Regulation. Connect to high side of sense resistor. An RC filter
may be necessary to eliminate leading-edge spikes.
5 GND Power-Supply Ground
6 NDRV External n-Channel MOSFET Gate Connection
7V
CC
Gate-Drive Supply. Internally regulated down from IN. Decouple with a 10nF or larger capacitor to GND.
8IN
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.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

MAX16802BEUA+

Mfr. #:
Buy MAX16802BEUA+
Manufacturer:
Maxim Integrated
Description:
LED Lighting Drivers Offline & DC/DC PWM for HB LED Driver
Lifecycle:
New from this manufacturer.
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