MAX16822AASA+ Maxim Integrated Products, MAX16822AASA+ Datasheet - Page 5

• Manufacturer Part Number: MAX16822AASA+
• Description: IC LED DRIVER HIGH BRIGHT 8-SOIC
• Manufacturer: Maxim Integrated Products
• Type: HBLED Driverr

Specifications of MAX16822AASA+

• Constant Current: Yes
• Topology: PWM, Step-Down (Buck)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Automotive
• Type - Secondary: High Brightness LED (HBLED)
• Frequency: 2MHz
• Voltage - Supply: 6.5 V ~ 65 V
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Operating Temperature: -40°C ~ 125°C
• Current - Output / Channel: 350mA
• Internal Switch(s): Yes
• Operating Supply Voltage: 6 V to 65 V
• Maximum Supply Current: 1.5 mA
• Maximum Power Dissipation: 588.2 mW
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Efficiency: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Integrated MOSFET and High-Side Current Sense
The MAX16822A/MAX16822B are step-down, constant-
current, high-brightness LED (HB LED) drivers. These
devices operate from a +6.5V to +65V input-voltage
range. The maximum output current is 500mA, if the
part is used at temperatures up to +105°C, or 350mA, if
it is used up to +125°C. A high-side current-sense
resistor sets the output current and a dedicated PWM
(V
unless otherwise noted.)
IN
= V
PIN
5, 6
1
2
3
4
7
8
DIM
= 48V, C
1.0
0.9
0.8
0.7
0.6
0.5
0.4
-40
TEMP_I
-25
NAME
_______________________________________________________________________________________
PGND
VCC
GND
DIM
CS
LX
IN
-10
2MHz, High-Brightness LED Drivers with
Detailed Description
= 1µF, R
vs. TEMPERATURE
5
V
TEMPERATURE (°C)
IN
20
= 48V
LX
35
RDSON
Current-Sense Input. Connect a resistor between IN and CS to program the LED current.
Positive Supply Voltage Input. Bypass with a 1μF or higher value capacitor to GND.
Ground
Power Ground
Switching Node
Logic-Level Dimming Input. Drive DIM low to turn off the current regulator. Drive DIM high to
enable the current regulator.
Thermal Foldback Control and Linear Input. Bypass with a 0.01μF capacitor to GND if thermal
foldback or analog dimming is used. See the Thermal Foldback section for more details.
SENSE
50
V
IN
65
= 65V
= 0.62Ω, L = 220µH (connected between IN and CS). Typical values are at T
V
80
IN
= 6.5V
95
110
Typical Operating Characteristics (continued)
125
dimming input enables pulsed LED dimming over a
wide range of brightness levels.
A high-side current-sensing scheme and an on-board
current-setting circuitry minimize the number of exter-
nal components while delivering LED current with ±3%
accuracy, using a 1% sense resistor. See Figure 1 for
an internal block diagram.
FUNCTION
30.0
29.5
29.0
28.5
28.0
27.5
27.0
26.5
26.0
25.5
25.0
-40
V
-25
IN
= 48V
-10
vs. TEMPERATURE
5
TEMPERATURE (°C)
20
I
TEMP_I
35
50
65
Pin Description
80
95
110
125
A
= +25°C,
5