USER’S MANUAL
UG074
Rev.2.00
Nov 14, 2018
ISL9238EVAL1Z
Evaluation Board User Guide
UG074 Rev.2.00
Page 1 of 17
Nov 14, 2018
Description
is a buck-boost Narrow Output Voltage DC (NVDC)
charger that uses the Renesas advanced R3™ Technology to
provide high light-load efficiency, fast transient response, and
seamless DCM/CCM transitions for a variety of mobile and
industrial applications.
In Charge mode, the ISL9238 takes input power from a wide
range (4V to 20V) of DC power sources (conventional AC/DC
charger adapters, USB PD ports, travel adapters, etc.) and
safely charges battery packs with up to four cells in a series
configuration.
The ISL9238 has an On-the-Go (OTG) function for 2- and 4-cell
battery applications. When the OTG function is enabled, the
ISL9238 operates in Reverse Buck mode to provide 5V at the
USB port.
The ISL9238 provides serial communication with SMBus/I
2
C
that allows programming of critical parameters to deliver a
customized solution. The programmable parameters include,
but are not limited to: adapter current limit, charger current
limit, system voltage setting, and trickle charging current limit.
The ISL9238EVAL1Z evaluation board demonstrates the
performance of the ISL9238. The default value numbers of the
battery in series, switching frequency, and the adapter current
limit charging function can be programmed by the resistor
from the PROG pin to GND. The values also can be set by
SMBus.
Related Literature
For a full list of related documents, refer to our website:
•
datasheet
Key Features
• Buck-boost NVDC charger for 1-, 2-, 3-, 4-cell Li-ion batteries
• End of Charge (EOC) option
• System power monitor PSYS output, IMVP-8 compliant
• PROCHOT# open-drain output, IMVP-8 compliant
• Allows trickle charging of depleted battery
• Optional ASGATE FET control
• Ideal diode control in Turbo mode
• Reverse buck, boost, and buck-boost operation from battery
• Two-level adapter current limit available
• Battery Ship mode option
• SMBus and auto-increment I
2
C compatible
Specifications
• V
IN
= 3.8V to 24V (no dead zone)
• V
OUT
= 2.5V to 12.6V
• MAX I
charge
up to 6A
• f
SW
= 1MHz maximum
Ordering Information
PART NUMBER
DESCRIPTION
ISL9238EVAL1Z
ISL9238 buck-boost charger evaluation board
FIGURE 1. BLOCK DIAGRAM
ISL9238
B
OOT
1
P
HAS
E
1
UG
AT
E
1
V
DDP
LG
A
T
E
1
LG
A
T
E
2
UG
AT
E
2
P
HAS
E
2
B
OOT
2
SC
L
SD
A
VBAT
CSOP
CSON
DC
IN
VD
D
CO
M
P
PSYS
BGATE
ASGATE
PROCHOT#
ACIN
ACOK
GND
CSIP
CSIN
AMON/BMON
BATGONE
VADP
VBAT
VSYS
PR
O
G
VSYS
OTGPG/CMOUT
ADP
OTGEN/CMIN
Q
1
Q
2
Q
4
Q
3
R
s1
Rs2
L1
Optional
