SI9169DB-K Vishay, SI9169DB-K Datasheet

SI9169DB-K

Manufacturer Part Number

SI9169DB-K

Description

IC, PWM/PSM CONTROL DEMONSTRATION BOARD

Manufacturer

Vishay

Datasheet

1.SI9169DB-K.pdf (5 pages)

Specifications of SI9169DB-K

Primary Input Voltage

No. Of Outputs

Output Voltage

2.7V

Output Current

No. Of Pins

Operating Temperature Range

-40Â°C To +85Â°C

Termination Type

SMD

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

Current page: 1 of 5
Download datasheet (425Kb)

The Si9169 is the higher power version of Si9165, with 1-A

output current capability compared to 600 mA for Si9165.

The Si9169 controller offers one of the most compact

synchronous buck or boost converter with 2.7- to 6-V input

voltage. The integrated MOSFETs and 2-MHz operating

frequency help shrinking the converter size dramatically.

There are two different version of demo boards (DB), buck and

boost converters, because the Si9169 can be easily

configured to buck or boost modes. The demo board has been

configured to generate 2.7-V regulated output for buck DB

while for boost DB is 3.6 V. The output voltage set point can be

easily adjusted by changing the value of R

using the formula

The demonstration board layout is available in Gerber file format. Please contact your Vishay Siliconix sales representative or

distributor for a copy.

1. Visually inspect demo board and make sure that Jumper 1

2. Attach an electronic load set to either resistive or current

3. Attach a dc power supply, with at least 3-A current

Document Number: 71089

08-Jan-02

D Voltage Mode Control

D Fully Integrated MOSFET Switches

D 1-A Load Capability

D 2.7- to 6-V Input Voltage Range for V

D Programmable PWM/PSM Control

D Up to 2-MHz Switching Frequency in PWM

D Synchronous Rectification in PWM

is set to Enable and Jumper 2 is set to PWM.

mode to the output pins (P3 and P4) on the demo board.

Set the load current to 200 mA or equivalent resistor value.

After the converter is powered up, output load current can

be adjusted.

capability, to the input pins (P1 and P2) on the demo board.

The input voltage can be adjusted between 2.7 and 3.6 V

for boost DB or 2.7 to 6 V for buck DB.

V REF

OUT

–1

Si9169 Demonstration Board

and V

(See Figure 1)

(1)

D Less than 200-mA I

D Integrated UVLO and POR

D Integrated Soft-Start

D Synchronization

D Shutdown Current t1 mA

D Wide Bandwidth Feedback Amplifier

D Single-Cell Li+ and 3-Cell NiCd or NiMH Operation

The typical value of V

change R

compensation.

The PWM/PSM pin can be used to program the controller to

operate in PWM or PSM mode. PWM is normal pulse width

modulation to keep output regulated through out the load

range, while the PSM mode offers better efficiency at light load

to conserve power by skipping switching pulses. Notice the

PSM only gain efficiency advantage at light load and can only

deliver certain load current (about 150 mA) before output

drops out of regulation.

Included in this document are schematics (Figure 1 and

Figure 2), demo board sample waveform (Figure 3 through 6),

PCB layout (Figure 7 through 12), and Bill Of Material (Table 1

and 2).

4. Put an oscilloscope ground on the input ground, and the

5. To test your DB in PSM, adjust the load to 20 mA. Then

Ch1 probe on the output and connect Ch2 probe on pin 20

of Si9169 (COIL pin). The waveform for buck and boost DB

should appear approximately as shown in Figure 3 and 4,

respectively.

change Jumper 2 setting to PSM. Notice the reduction of

the input current. With the same probe setup mentioned

above, the waveform for buck and boost DB should appear

approximately as shown in Figure 5 and 6, respectively.

since that would alter the control loop

REF

in PSM

is 1.3 V. It is recommended not to

Vishay Siliconix

Si9169DB

www.vishay.com

Related parts for SI9169DB-K

SI9169DB-K Summary of contents

Page 1

... To test your DB in PSM, adjust the load to 20 mA. Then change Jumper 2 setting to PSM. Notice the reduction of the input current. With the same probe setup mentioned above, the waveform for buck and boost DB should appear approximately as shown in Figure 5 and 6, respectively. Si9169DB Vishay Siliconix in PSM recommended not to ...

Page 2

... Si9169DB Vishay Siliconix 0 JP1 JP2 Enable Converter PWM Disable –PSM SYNC 1.3 V GND C 5 0.1 mF JP1: – for converter ENABLE mode. IN –SD to PGND for SHUTDOWN mode. JP2: PWM/–PSM to V for PWM mode. IN PWM/–PSM to PGND for PSM mode JP1 JP2 ...

Page 3

... FIGURE 5. Buck DB PSM Mode 3 Load = 20 mA Document Number: 71089 08-Jan-02 V OUT COIL = 2.7 V, FIGURE 4. Boost DB PWM Mode: V OUT V OUT COIL = 2.7 V, FIGURE 6. Boost DB PSM Mode: V OUT Si9169DB Vishay Siliconix V OUT = 3 OUT Load = 200 mA V OUT = 3 OUT Load = 20 mA www.vishay.com COIL COIL ...

Page 4

... Si9169DB Vishay Siliconix FIGURE 7. Buck—Top Silk Screen FIGURE 8. Buck—Top Layer FIGURE 9. Buck—Bottom Layer www.vishay.com 4 FIGURE 10.Boost—Top Silk Screen FIGURE 11.Boost—Top Layer FIGURE 12.Boost—Bottom Layer Document Number: 71089 08-Jan-02 ...

Page 5

... Resistor, 1 Capacitor, Ceramic Capacitor, Ceramic Capacitor, Ceramic Capacitor, Ceramic Capacitor, Ceramic Schottky Diode IHLP Low Profile Inductor Power IC 3-Pin Jumper 1-Pin Header Si9169DB Vishay Siliconix Footprint Part Number Manufacturer 0805 CRCW08052202FRT1 0805 CRCW08052002FRT1 0805 CRCW08052502FRT1 0805 CRCW0805500JRT1 0805 CRCW08051001FRT1 0805 ...

Related keywords

SI9169DB-K datasheet
SI9169DB-K data sheet
SI9169DB-K pdf datasheet
SI9169DB-K component
SI9169DB-K part
SI9169DB-K distributor
SI9169DB-K RoHS
SI9169DB-K datasheet download