MAX16818ETI+ Maxim Integrated Products, MAX16818ETI+ Datasheet - Page 14

• Manufacturer Part Number: MAX16818ETI+
• Description: IC LED DRIVR PWM CONTROL 28-TQFN
• Manufacturer: Maxim Integrated Products
• Type: PWM Controlr

Specifications of MAX16818ETI+

• Topology: High Side, Low Side, PWM, SEPIC, Step-Down (Buck), Step-Up (Boost)
• Number Of Outputs: 1
• Internal Driver: No
• Type - Primary: Automotive, Backlight
• Type - Secondary: High Brightness LED (HBLED)
• Frequency: 125kHz ~ 1.5MHz
• Voltage - Supply: 4.75 V ~ 5.5 V, 7 V ~ 28 V
• Voltage - Output: 5.1V
• Mounting Type: Surface Mount
• Package / Case: 28-TQFN Exposed Pad
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 30A
• Internal Switch(s): Yes
• Low Level Output Current: 4 A
• High Level Output Current: 4000000 uA (Typ)
• Operating Supply Voltage: 7 V to 28 V
• Maximum Supply Current: 5.5 mA
• Maximum Power Dissipation: 2758 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Efficiency: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

1.5MHz, 30A High-Efficiency, LED Driver
with Rapid LED Current Pulsing
Figure 6. MAX16818 Functional Diagram
14
______________________________________________________________________________________
RT/SYNC
CLKOUT
SENSE+
V_IOUT
SENSE-
EAOUT
SGND
CSP
CSN
DIFF
CLP
EAN
V
LIM
OVI
EN
CC
IN
A
V
SOFT-
START
DIFF
AMP
= 4
OSCILLATOR
+0.6V
REGULATOR
V
LDO
CC
5V
VEA
ERROR AMP
V
V
I
REF
CM
S
V
CLAMP
LOW
(0.6V)
= 0.6V
GENERATOR
0.5V x V
RAMP
A
CA
V
= 34.5
TO INTERNAL
CC
CIRCUITS
CLK
V
HIGH
CLAMP
g
m
CEA
= 500µS
TEMP SENSOR
UVLO
POR
2 x f
100kΩ
RAMP
0.5 x V
S
(V/s)
CURRENT LIMIT
HICCUP MODE
COMPARATOR
CLAMP
CPWM
V
PWM
CM
126.7kΩ
0.12 x V
0.1 x V
C
t
V
S
R
REF
REF
CM
OVP COMP
S
R
Q
Q
MAX16818
CLEAR ON UVLO RESET OR
Q
Q
Functional Diagram
ENABLE LOW
OVP LATCH
N
LATCH
R
T
V
BST
DH
LX
DL
PGND
PGOOD
DD