1ED44173N01B
Single-channel low-side MOSFET gate driver IC with fast OCP
Features
Over-current detection (OCP) with negative voltage input
-0.246 V over-current threshold with accurate ±5% tolerance
Single pin for fault output and enable
Programmable fault clear time
Under voltage lockout for MOSFETs
CMOS Schmitt-triggered inputs
3.3 V, 5 V and 15 V input logic compatible
25 V V
CC
voltage supply support (max)
Output in phase with input
-10 V
DC
negative Input capability of OCP pin
3 kV ESD HBM
RoHS compliant
Potential applications
Digitally controlled PFC
Home appliances
Air conditioner
Industrial applications
General purpose low-side gate driver for single-
single-ended topologies
Description
The 1ED44173N01B is a low-voltage, power MOSFET non-inverting gate driver. Proprietary latch immune CMOS technologies
enable ruggedized monolithic construction. The logic input is compatible with standard CMOS or LSTTL output. The output
driver features a current buffer stage. The 1ED44173N01B has OCP pin for over current protection sense and a FAULT status
output (Once it is active,
EN/FLT
pin is internally pulled down). The
EN/FLT
needs to be outside pulled up to provide normal
operation, pulling
EN/FLT
low disable the driver. Internal circuitry on V
CC
pin provides an under voltage lockout protection
that holds output low until V
CC
supply voltage is within operating range.
Vin+
Vout
Vcc
Vdd
1ED44173N01B
4
R
FLTC
I/O2
Vcc
OUT 3
COM
OCP
2
1
5 EN/FLT
6
IN
µC
I/O1
C
FLTC
Gnd
Rcs
Vin-
(Refer to lead assignments for correct
pin configuration). This diagram show
electrical connections only. Please refer
to our application notes and design tips
for proper circuit board layout.
Figure 1
Typical application
Package
PG-SOT23-6-3
Ordering information
Product type
1ED44173N01B
Standard pack
Form
Tape and Reel
Orderable part number
Quantity
3000
1ED44173N01BXTSA1
Product validation
Qualified for industrial applications according to the relevant tests of JEDEC JESD47/22 and J-STD-020.
Datasheet
Please read the Important Notice and Warnings at the end of this document
www.infineon.com/gdLowSide
Page 1 of 20
1.1
2021-07-22
1ED44173N01B
Single-channel low-side gate driver IC with over-current protection
Table of contents
1
2
2.1
2.2
3
4
4.1
4.2
4.3
4.4
5
5.1
5.2
5.3
5.4
5.5
5.6
5.7
6
7
8
9
10
Block diagram........................................................................................................................ 3
Pin configuration and functionality .......................................................................................... 4
Pin configuration ..................................................................................................................................... 4
Input/output logic truth table ................................................................................................................ 5
Qualification information........................................................................................................ 6
Electrical parameters ............................................................................................................. 7
Absolute maximum ratings ..................................................................................................................... 7
Recommended operating conditions..................................................................................................... 7
Static electrical characteristics ............................................................................................................... 8
Dynamic electrical characteristics .......................................................................................................... 8
Application information and additional details .......................................................................... 9
MOSFET gate driver ................................................................................................................................. 9
Switching and timing relationships ........................................................................................................ 9
Input logic compatibility ....................................................................................................................... 10
Undervoltage lockout (V
CC
) ................................................................................................................... 10
Over current protection (OCP) .............................................................................................................. 11
Fault reporting and programmable fault clear timer .......................................................................... 12
Enable input .......................................................................................................................................... 12
Package outline: PG-SOT23-6-3 .............................................................................................. 14
Tape and reel details ............................................................................................................. 15
Part marking information ...................................................................................................... 16
Similar products ................................................................................................................... 17
Related documents ............................................................................................................... 18
Revision history............................................................................................................................. 19
Datasheet
www.infineon.com/gdLowSide
2 of 20
1.1
2021-07-22
1ED44173N01B
Single-channel low-side gate driver IC with over-current protection
1
Block diagram
Vcc
Vcc
1
4
UVLO &
Filter
3.3 V
2.15 M
PWM
disable
logic
3
OUT
EN/FLT
5
Fault
output
Q
FLT
UVLO
2
COM
OCP
V
OCTH
Filter
IN
6
1
OCP
Figure 2
Block diagram
Datasheet
www.infineon.com/gdLowSide
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1.1
2021-07-22
1ED44173N01B
Single-channel low-side gate driver IC with over-current protection
2
2.1
Table 1
Pin no.
1
2
3
4
Pin configuration and functionality
Pin configuration
Pin configuration
Name
OCP
COM
OUT
V
CC
Function
Current sense input
Ground
Gate drive output
Supply Voltage
Enable, fault reporting and fault clear time program pin, three functions:
1. Logic input to enable I/O functionality. I/O logic functions when ENABLE is high.
2. Fault reporting function like over-current or undervoltage lockout, this pin has
negative logic and an open-drain output.
3.
Fault clear time program with external resistor and capacitor.
Logic input for gate driver output (OUT), in phase
5
EN/FLT
6
IN
4
Vcc
OUT 3
COM
OCP
2
1
5
EN/FLT
6
IN
Figure 3
PG-SOT23-6-3 (top view)
Datasheet
www.infineon.com/gdLowSide
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1.1
2021-07-22
1ED44173N01B
Single-channel low-side gate driver IC with over-current protection
2.2
Table 2
IN
L
H
X
X
X
1)
2)
3)
Input/output logic truth table
Input/output logic truth table
UVLO
1)
H
H
L
H
H
OCP
2)
L
L
X
H
X
/
3)
H
H
L
L
L
OUT
L
H
L
L
L
Note
OUT = L
OUT = H
OUT = L,
EN/FLT
= L, (UVLO protection will disable input
signals until
EN/FLT
returns to high level.)
OUT = L,
EN/FLT
= L, (Over current protection will disable
input signals until
EN/FLT
returns to high level.)
OUT = L (Externally pull down
EN/FLT
pin will disable I/O
logic until
EN/FLT
returns to high level.)
UVLO “L” state is under-voltage protection.
OCP “H” state is over-current protection.
EN/FLT
“H” state is
EN/FLT
pin externally pulling up and internally pull down MOSFET (QFLT) is off.
(See Block Diagram.)
Datasheet
www.infineon.com/gdLowSide
5 of 20
1.1
2021-07-22
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