ISL8206MEVAL1Z Datasheet ISL8204MEVAL1Z, ISL8201MEVAL1Z, ISL8206MEVAL1Z | P4-P6

AN1386.1

December 23, 2009

Efficiency and Output

Ripple/Noise Measurement

Figure 5 shows the efficiency measurement schematic for

the ISL820xMEVAL1Z POL module. The voltage and

current meter can be used to measure input/output

voltage and current. In order to obtain an accurate

measurement and prevent the voltage drop of PCB or

wire trace, the voltage meter must be close to the

input/output pin of the POL module.

The efficiency equation is shown in Equation 1:

The equipment setup for the efficiency measurement on

the evaluation board is shown in Figure 6. The measuring

point for the input voltage meter is at the C

terminal,

and the measuring point for the output voltage meter is

at the C

terminal (refer to Figure 9).

Output Ripple/Noise Measurement Method

The total noise is equal to the sum of the ripple and

noise components. Simple steps should be taken to

assure that there is minimum pickup noise due to the

high frequency events, which can be magnified by the

large ground loop formed by the oscilloscope probe

ground. This means that even a few inches of ground

wire on the oscilloscope probe may result in hundreds of

millivolts of noise spikes when improperly routed or

terminated. This effect can be overcome by using the

short loop measurement method to minimize the

measurement loop area for reducing the pickup noise.

The short loop measurement method is shown in

Figure 7. For ISL820xMEVAL1Z evaluation board, the

output ripple/noise measurement point is located at the

terminal (refer to Figure 9).

Efficiency

Output Power

Input Power

------------------------------------

OUT

----------------

OUT

•()

----------------------------------------

===

(EQ. 1)

FIGURE 5. EFFICIENCY MEASUREMENT SCHEMATIC

PVCC

VIN

VOUT

Cin

Cout

SEN-EX

PVCC

DC Source

DC Load

DC Source

Iin

Vin

Vout

Iout

PGND

COMP/EN

VIN

VOUT

PHASE

ISET

PVCC

ELECTRONIC LOAD

Vin

DC POWER SUPPLY

PVCC

DC POWER SUPPLY

Current

Meter

Voltage

Meter

Voltage

Meter

FIGURE 6. EQUIPMENT SETUP FOR EFFICIENCY

MEASUREMENT

SHORT LOOP

MEASUREMENT

METHOD

FIGURE 7. OUTPUT RIPPLE/NOISE

MEASUREMENT METHOD

Application Note 1386

AN1386.1

December 23, 2009

NOTES:

1. R

is used to set the output voltage of ISL820xMEVAL1Z. Initial setting is 6.49kΩ for 1.5V output voltage.

2. R

and R

, paralleling with R

, are used to adjust the output voltage of ISL820xMEVAL1Z.

3. R

is used to set the overcurrent trip level of ISL820xMEVAL1Z. The ISL8201MEVAL1Z has integrated 3.57kΩ, ISL8206MEVAL1Z has integrated 4.12kΩ, and

ISL8204MEVAL1Z has integrated 2.87kΩ

4. R

, C

and C

are the snubber network, which can reduce the stress for internal semiconductor.

5. R

, R

, C

and C

are the external compensation network. The ISL820xMEVAL1Z has integrated the type 3 compensation network inside the module

for typical applications.

6. R

, R

, C

, Q

and Q

are the power-up sequence circuit. In case of PVCC bias, power-up first, then input voltage. This circuit has to be implemented.

FIGURE 8. SCHEMATIC

Application Note 1386

AN1386.1

December 23, 2009

TABLE 4. BILL OF MATERIALS

SYMBOL COMPONENTS DESCRIPTION SUPPLIER

R1 Resistor Chip Resistor 6.49kΩ Generic

R2 Resistor Not installed -

R3 Resistor Not installed -

R4 Resistor Not installed -

R8 Resistor Chip Resistor 10Ω Generic

R13 Resistor Not installed -

R14 Resistor Not installed -

R15 Resistor Not installed -

R16 Resistor Not installed -

R17 Resistor Not installed -

R18 Resistor Not installed -

R20 Resistor Not installed -

R21 Resistor Not installed -

C1 Capacitor AL Capacitor 220µF/35V SANYO

C1A Capacitor Not installed -

C2 Capacitor Ceramic Capacitor 10µF/25V MURATA/TDK

C3 Capacitor Ceramic Capacitor 10µF/25V MURATA/TDK

C5 Capacitor POS Capacitor 330µF/6.3V SANYO

C5A Capacitor Not installed -

C6 Capacitor Not installed -

C6A Capacitor Ceramic Capacitor 22µF/10V MURATA/TDK

C7 Capacitor Ceramic Capacitor 22µF/10V MURATA/TDK

C7A Capacitor Not installed MURATA/TDK

C8 Capacitor Ceramic Capacitor 22µF/10V MURATA/TDK

C8A Capacitor Not installed -

C9 Capacitor Not installed -

C10 Capacitor Ceramic Capacitor 1µF/25V YAGEO

C11 Capacitor Ceramic Capacitor 1µF/25V YAGEO

C12 Capacitor Not installed -

C13 Capacitor Not installed -

C14 Capacitor Not installed -

C15 Capacitor Not installed -

C17 Capacitor Not installed -

C18 Capacitor Not installed -

C19 Capacitor Not installed -

S1 Switch UT Switch SH

S2 Switch UT Switch SH

Q2 MOSFET Not installed -

Q3 MOSFET Not installed -

U1 Module ISL8201M, ISL8206M, or ISL8204M Intersil

Application Note 1386

P1-P3 P4-P6 P7-P9

ISL8206MEVAL1Z

Mfr. #:

Buy ISL8206MEVAL1Z

Manufacturer:

Renesas / Intersil

Description:

ISL8206M DC to DC Converter and Switching Regulator Module 0.6VDC to 6VDC Output Evaluation Board

Lifecycle:

New from this manufacturer.

Delivery:

DHL FedEx Ups TNT EMS

Payment:

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ISL8206MEVAL1Z

ISL8206MEVAL1Z

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