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MAX16802AEUA+

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
MAX16801A/B/MAX16802A/B
Offline and DC-DC PWM Controllers for
High-Brightness LED Drivers
______________________________________________________________________________________ 13
MAX16801B
IN
V
CC
R1
OPTIONAL ONLY WHEN PWM DIMMING IS USED
C1
*PWM
C2
C5
Q1
D1D3
T1
R4
R3
D2
LEDs
R2
CS
NDRV
GND
DIM/FB UVLO/EN
C3
C4
C6
BRIDGE
RECTIFIER
UNIVERSAL
AC INPUT
*WARNING: PWM DIMMING SIGNAL IS SHOWN AT THE PRIMARY SIDE.
USE AN OPTOCOUPLER FOR SAFETY ISOLATION OF THE PWM SIGNAL.
Figure 8. Universal AC Input, Offline, Isolated Flyback HB LED Driver with Low-Frequency PWM Dimming
MAX16801
+V
IN
IN
V
OUT
V
CC
R1
R6
R5
R7
C1
C2
C5
R10
R9
R8
R11
C3
Z1
C4
Q1
D1
T1
R4
U3
TLV431
R3
D3
R2
CS
NDRV
COMP GND
DIM/FB UVLO/EN
U2
OPTO TRANS
U2
OPTO LED
GND
Figure 9. Universal Input, Offline, High-Accuracy Current Regulation in an Isolated Flyback HB LED Driver
MAX16801A/B/MAX16802A/B
Offline and DC-DC PWM Controllers for
High-Brightness LED Drivers
14 ______________________________________________________________________________________
Functional Diagram
IN
UVLO
COMP
FB
S
IN
REG_OK
V
CC
V
CC
V
L
Q
R
CS
DIGITAL
SOFT-START
ERROR
AMP
REFERENCE
1.23V
IN
CLAMP
26.1V
CPWM
*OSCILLATOR
264kHz
THERMAL
SHUTDOWN
LIM
1.38V
V
CS
0.3V
21.6V
9.74V
1.28V
1.23V
BOOTSTRAP UVLO**
(INTERNAL 5.25V SUPPLY)
REGULATOR
DRIVER
UVLO
NDRV
GND
*MAX16801A/MAX16802A: 50% MAXIMUM DUTY CYCLE
MAX16801B/MAX16802B: 75% MAXIMUM DUTY CYCLE
**MAX16801 ONLY
MAX16801
MAX16802
V
OPWM
PART
BOOTSTRAP
UVLO
STARTUP
VOLTAGE
(V)
MAX DUTY
CYCLE (%)
MAX16801A Yes 22 50
MAX16801B Yes 22 75
MAX16802A No 10.8* 50
MAX16802B No 10.8* 75
*The MAX16802 does not have an internal bootstrap UVLO.
The MAX16802 starts operation as long as the V
CC
pin is high-
er than +7V, (the guaranteed output with an IN pin voltage of
+10.8V), and the UVLO/EN pin is high.
1
2
8
7
3
4
6
5
MAX16801
MAX16802
UVLO/EN
TOP VIEW
IN
V
CC
NDRV
GND
DIM/FB
COMP
CS
µMAX
Pin Configuration
Selector Guide
MAX16801A/B/MAX16802A/B
Offline and DC-DC PWM Controllers for
High-Brightness LED Drivers
______________________________________________________________________________________ 15
Package Information
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the
package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the
package regardless of RoHS status.
PACKAGE TYPE PACKAGE CODE DOCUMENT NO.
8 µMAX — 21-0036
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

MAX16802AEUA+

Mfr. #:
Buy MAX16802AEUA+
Manufacturer:
Maxim Integrated
Description:
LED Lighting Drivers Offline & DC/DC PWM for HB LED Driver
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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