Datasheet Brief
KTD2041
March 2022 – Revision 04b Page 1 of 2 Kinetic Technologies Confidential
9-Channel IR LED Driver with Buck Regulator and I
2
C Interface
Features
• 2.7V to 5.5V Input Voltage Operating Range
• Nine High-Precision Current Sinks
LED Current Up to 32mA per Channel
±1% Typical Current Matching
±2% Typical Current Accuracy at 32mA
6-bit Current Dimming Control with I
2
C
Independent On/Off Control
Supports both Independent and Global Dimming
• High Efficiency Buck Regulator
Integrated 200mΩ / 100mΩ High / Low-Side FET
Adaptive On-Time Control with default 1MHz
Switching Frequency, with factory programmable
1.5MHz, 2MHz, and 2.5MHz options.
Adaptive VOUT Control Based on the Headroom
Voltages of the LED Current Sinks.
Selectable Auto-Skip Mode or Forced-PWM mode
at Light Loads
• 140μA Typical No-Load Supply Current
• Open-Drain FAULT
Signal Output and Fault Reset
• Extensive Fault Diagnostics
• -40°C - 85°C Operating Ambient Temperature Range
Small UQFN-20 (3mm x 3mm) Package
Applications
• IR LED Drivers
• Video Door Bells
• Security Cameras
• IRIS Recognition Cameras
Brief Description
The KTD2041 is an ideal power solution for IR LED
driver with an integrated buck regulator. It has 9 high-
precision current sinks that can be independently
controlled via I
2
C interface.
The buck regulator has an input voltage operating range
from 2.7V to 5.5V to accommodate 1-cell lithium- ion
batteries or 5V voltage rail. It has adaptive output
voltage control based on the headroom voltages of the
LED current sinks to minimize the power consumption.
It has integrated high-side and low-side power FET. The
buck regulator features advanced adaptive On- Time
control with 1MHz switching frequency, which minimizes
external component counts and allows the use of a very
small inductor and capacitor.
The KTD2041 has 9 built-in current sinks, which features
independent On/Off control and 6-bit independent
current dimming via I
2
C interface. The KTD2041 has
extensive built-in protection features including cycle-by-
cycle current limit, input undervoltage Lockout (UVLO),
output over-voltage protection, LED fault (open or short)
protection and thermal shutdown protection.
The KTD2041 is available in a RoHS and Green
compliant 3mm x 3mm UQFN package.
Typical Application
GND
VOUT
L1
4.7µH
LED9
LED8
LED7
LED6
LED5
LED4
LED3
LED2
LED1
LX
VOUT
PGND
SDA
SCL
FAULT
RESET
MODE
EN
VIN
C
IN
10µF
VIN
2.7V to 5.5V
KTD2041
C
OUT
22µF
For full datasheet, click HERE.
Datasheet Brief
KTD2041
March 2022 – Revision 04b Page 2 of 2 Kinetic Technologies Confidential
Ordering Information
Part Number
Marking
1
Operating Temperature
Package
KTD2041EUAC-TR
XXYYZ
-40°C to +85°C
UQFN33-20
1. XX = Device ID Code, YWZ = Date and Assembly Code.
Kinetic Technologies cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Kinetic Technologies product.
No intellectual property or circuit patent licenses are implied. Kinetic Technologies reserves the right to change the circuitry and specifications
without notice at any time.