MAX17115 Evaluation Kit

4 ______________________________________________________________________________________

Jumper Selection

Several jumper settings in the following tables illustrate

features of the MAX17115 EV kit.

Enable Control Input (EN)

Connect EN to AGND to disable the step-up switching

regulator operation. Connect EN to VIN to enable the

boost operation. See Table 1 for jumper JU1 functions.

Frequency Select Input (FREQ)

Connect FREQ to AGND to select the step-up regula-

tor’s 640kHz operating frequency. Connect FREQ to

VIN to select the step-up regulator’s 1.2MHz operating

frequency. See Table 2 for jumper JU2 functions.

High-Voltage Stress Control Input (HVS_EN)

Connect HVS_EN to VIN to turn on the internal switch

between RHVS and AGND. Connect HVS_EN to AGND

to make the RHVS pin high-impedance. See Table 3 for

jumper JU3 functions.

High-Voltage Switch Control Input (VFLK)

When VFLK is connected to VIN, the high-voltage switch

between VGH and VGHM is on and the high-voltage

switch between VGHM and DRN is off. When VFLK

is connected to AGND, the switch between VGH and

VGHM is off and the switch between VGHM and DRN is

on. See Table 4 for jumper JU4 functions.

Table 1. Jumper JU1 Functions

Table 3. Jumper JU3 Functions

Table 2. Jumper JU2 Functions

Table 4. Jumper JU4 Functions

*Default position.

*Default position.

*Default position.

*Default position.

SHUNT

POSITION

EN PIN

EV KIT

OUTPUTS

Installed

EN connected to AGND

Outputs disabled

(VMAIN = 0V)

Not

installed*

EN connected to VIN

through R3

Outputs enabled

(VMAIN = 16V)

SHUNT

POSITION

HVS_EN PIN

RHVS

Installed

HVS_EN connected to

VIN

RHVS connected

to AGND

Not

installed*

HVS_EN connected to

AGND through R5

RHVS at high

impedance

SHUNT

POSITION

FREQ PIN

OPERATION OF

FREQUENCY

Installed

FREQ connected to

AGND

640kHz

Not

installed*

FREQ connected to VIN

through R4

1.2MHz

SHUNT

POSITION

VFLK

VGHM

Installed*

VFLK connected to VIN

VGHM = VGON

Not

installed

VFLK connected to

AGND through R6