Datasheet
SDBST PIN
(JU3)
SDSPK PIN
(JU2)
BOOST
STATUS
SPEAKER
STATUS
2-3 (low) 2-3 (low) Off Off
2-3 (low) 1-2 (high) Off Off
1-2 (high) 2-3 (low) On Off
1-2* (high) 1-2* (high) On On
SHUNT
POSITION
IN- PIN INPUT MODE
Installed*
Connected to
AGND
Single-ended/
unbalanced input
Not installed
Connected to user-
supplied negative
differential output
Differential input
DESIGNATION QTY DESCRIPTION
L2, L3 2
22FH Q20%, 2A inductors
(D75LC)
TOKO B1047AS-220M
DESIGNATION QTY DESCRIPTION
C5 1
22FF, 6.3V ceramic capacitor
(0805)
C8 1
0.1FF, 6.3V ceramic capacitor
(0402)
DESIGNATION QTY DESCRIPTION
C5 1
22FF, 6.3V ceramic capacitor
(0603)
C8 1 Not installed, ceramic capacitor
_________________________________________________________________ Maxim Integrated Products 3
MAX98502 Evaluation Kit
Evaluates: MAX98502
Input Mode
Jumper JU4 provides the option to select between a dif-
ferential or single-ended input mode for the EV kit. See
Table 3 for JU4 configuration.
Optional Output Filtering
The IC is designed to pass FCC emissions standards
without any filtering when using up to 24in of cable to
connect the speaker. When evaluating the IC without any
filtering, connect the speaker to the output test points
(OUT+/OUT-).
The EV kit also features PCB pads for a lowpass filter that
can be added to ease evaluation. Audio analyzers typi-
cally cannot accept the Class D amplifier’s pulse-width-
modulated (PWM) waveform at their inputs. The lowpass
filter extracts the audio content from the PWM output
signal and allows the device to be connected directly
to an audio analyzer. The PWM output signal can be
lowpass-filtered by simply installing L2 and L3; all other
components are populated. The filtered outputs should
then be monitored at the FOUT+/FOUT- pads. See Table
4 for suggested filtering components for an 8I load.
Contact the factory for suggested filtering components
for a 4I load.
Optional Output Loading
The EV kit can be used to drive a 4I or 8I load. See
tables 5 and 6 below for required components for each
load.
Table 3. Input Mode (JU4)
Table 4. Suggested Filtering Components
for 8I Load
Table 5. Components Required for 4I
Speaker Drive
Table 6. Minimum Components Required
for 8I Speaker Drive
*Default position.
*Default position.
Table 2. Shutdown Configuration
(JU2, JU3)