8 Application and Implementation

Note

Information in the following applications sections is not part of the TI component specification, and

TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining

suitability of components for their purposes. Customers should validate and test their design

implementation to confirm system functionality.

8.1 Application Information

The TPS92201 device is typically used as buck-type LED driver to drive IR or white LEDs from a 2.5V to 5.5V

input.

8.2 Typical Application

PWM

VIN

FB

GND

SW

VOUT

2.5 V - 5.5 V

EN

2.2 H

250 m

10 F

4.7 F

PWM Input

Figure 8-1. TPS92201 400mA Output Application

8.2.1 Design Requirements

For this design example, use the parameters listed in Table 8-1 as the input parameters.

Table 8-1. Design Parameters

DESIGN PARAMETER

EXAMPLE VALUE

Input voltage

2.5V to 5.5V

Output voltage

1.9V (1.8V Vf + 0.1V VFB)

Maximum output current

400mA

Table 8-2 lists the components used for the example.

Table 8-2. List of Components

REFERENCE

DESCRIPTION

MANUFACTURER(1)

C1

4.7µF, Ceramic Capacitor, 10V, X7R, size 0805, GRM21BR71A475KA73L

Murata

C2

10µF, Ceramic Capacitor, 10V, X7R, size 0805, GRM21BR71A106KE51L

Murata

L1

2.2µH, Power Inductor, SDER041H-2R2MS

Cyntec

R1,R2,R3

Chip resistor, 1%, size 0603

Std.

C3

Optional, 6.8pF if it is needed

Std.

(1)

See Third-party Products Disclaimer

TPS92201, TPS92201A

SLVSH40B – NOVEMBER 2023 – REVISED AUGUST 2024

www.ti.com

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