Renesas ISL9238EVAL1Z User Manual
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Renesas ISL9238EVAL1Z User Manual

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ISL9238EVAL1Z
Evaluation Board User Guide
Description
The
ISL9238
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
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:
•
ISL9238
datasheet
UG074 Rev.2.00
Nov 14, 2018
2
C
Optional
R
VADP
s1
CSIN
CSIP
ASGATE
ADP
ACIN
ACOK
PROCHOT#
AMON/BMON
BATGONE
OTGEN/CMIN
FIGURE 1. BLOCK DIAGRAM
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
Specifications
• V
= 3.8V to 24V (no dead zone)
IN
• V
= 2.5V to 12.6V
OUT
• MAX I
up to 6A
charge
• f
= 1MHz maximum
SW
Ordering Information
PART NUMBER
ISL9238EVAL1Z
ISL9238 buck-boost charger evaluation board
Q
Q
1
4
L1
Q
Q
3
2
VSYS
CSOP
CSON
ISL9238
BGATE
GND
VBAT
OTGPG/CMOUT
PSYS
USER'S MANUAL
Nov 14, 2018
2
C compatible
DESCRIPTION
VSYS
Rs2
VBAT
Page 1 of 17
UG074
Rev.2.00

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Summary of Contents for Renesas ISL9238EVAL1Z

  • Page 1 Narrow Output Voltage DC (NVDC) • Buck-boost NVDC charger for 1-, 2-, 3-, 4-cell Li-ion batteries charger that uses the Renesas advanced R3™ Technology to • End of Charge (EOC) option provide high light-load efficiency, fast transient response, and •...

  • Page 2: Recommended Equipment

    Functional Description seamless switching from Boost mode to Buck-Boost mode and finally into Buck mode. The ISL9238EVAL1Z provides all circuits required to evaluate the Input Current Limit Regulation features of the ISL9238. A majority of the features of the ISL9238, such as adjustable output voltage, On-the-Go (OTG) 1.
  • Page 3 ISL9238EVAL1Z FIGURE 2. GUI SNAPSHOT (+) DMM LEAD (+) SUPPLY LEAD (-) DMM LEAD (-) SUPPLY LEAD (+) BATTERY USB PORT LEAD FOR SMBus (-) BATTERY LED 1, 2, 3 BATGONE BGATE LEAD FIGURE 3. EVALUATION BOARD CONNECTION GUIDELINE UG074 Rev.2.00...
  • Page 4 ISL9238EVAL1Z Charging Mode Trickle Charging Mode 1. Set the power supply to a constant value between 3.8V and 1. Complete Steps 1 through 6 in “Charging Mode” without any 24V, then complete Steps 1 and 2 in “System Voltage changes.
  • Page 5 ISL9238EVAL1Z FIGURE 4. OTGVOLTAGE AND OTGCURRENT SETTINGS IN THE GUI FIGURE 5. OTG FUNCTION ENABLE UG074 Rev.2.00 Page 5 of 17 Nov 14, 2018...
  • Page 6 ISL9238EVAL1Z Schematic All NFETs and PFETs are 3x3 size FOR NO ASGATE OPTION SDA, SCL, ACOK, PROCHOT#, BATGONE, OTGPG/CMOUT, OTGEN all have 3V3 or VDD pull up options For battery connector connection FIGURE 6. ISL9238EVAL1Z BOARD SCHEMATIC...
  • Page 7 ISL9238EVAL1Z FIGURE 7. TOP OF BOARD FIGURE 8. BOTTOM OF BOARD UG074 Rev.2.00 Page 7 of 17 Nov 14, 2018...

  • Page 8: Bill Of Materials

    ISL9238EVAL1Z Bill of Materials REFERENCE DESIGNATOR DESCRIPTION MANUFACTURER MANUFACTURER PART SEE LABEL-RENAME BOARD PWB-PCB, ISL9237EVAL1Z, REVB, ROHS IMAGINEERING INC ISL9237EVAL1ZREVBPCB C1, C2, C3, C4 CAP-POSCAP, SMD, 7.3x4.3x1.9, 47µF, 20V, SANYO 20TQC47MYF 20%, 55mΩ, ROHS CAP, SMD, 0603, 10pF, 50V, 10%, NP0, ROHS...
  • Page 9 DO NOT POPULATE OR PURCHASE AFFIX TO BACK OF PCB LABEL-DATE CODE_LINE 1: YRWK/REV#, LINE 2: RENESAS LABEL-DATE CODE BOM NAME RENAME PCB TO: ISL9238EVAL1Z. LABEL, TO RENAME BOARD RENESAS LABEL-RENAME BOARD UG074 Rev.2.00 Page 9 of 17 Nov 14, 2018...

  • Page 10: Pcb Layout Guidelines

    Run the UGATE2 and PHASE2 traces in parallel with sufficient width. Do not allow any sensitive analog signal traces to cross over or get close to this pin. Renesas recommends routing the PHASE2 trace to the high-side MOSFET source PHASE2 pin instead of general copper.
  • Page 11 PHASE1 Run the PHASE1 and UGATE1 traces in parallel with sufficient width. Do not allow any sensitive analog signal traces to cross over or get close to these pins. Renesas recommends routing the PHASE1 trace to the high-side MOSFET UGATE1 source pin instead of general copper.

  • Page 12: Board Layout

    ISL9238EVAL1Z PCB Layout Guidelines (Continued) PIN NUMBER PIN NAME LAYOUT GUIDELINES AMON/BMON No special consideration. Place the optional RC filter in the general proximity of the controller. PSYS Signal pin, current source output. No special consideration. VBAT Place the optional RC filter in the general proximity of the controller. Run a dedicated trace from the battery positive connection point to the IC.
  • Page 13 ISL9238EVAL1Z Board Layout (Continued) FIGURE 10. INNER LAYER 1 FIGURE 11. INNER LAYER 2 UG074 Rev.2.00 Page 13 of 17 Nov 14, 2018...

  • Page 14: Typical Performance

    ISL9238EVAL1Z Board Layout (Continued) FIGURE 12. BOTTOM LAYER Typical Performance FIGURE 13. BOOST MODE, OUTPUT VOLTAGE LOOP TO ADAPTER FIGURE 14. BOOST MODE, CHARGING CURRENT LOOP TO ADAPTER CURRENT LOOP TRANSITION. V = 5V, CURRENT LOOP TRANSITION. V = 5V, MAXSYSTEMVOLTAGE = 8.496V, V...
  • Page 15 ISL9238EVAL1Z Typical Performance (Continued) FIGURE 15. BUCK-BOOST MODE, OUTPUT VOLTAGE LOOP TO FIGURE 16. BUCK-BOOST MODE, CHARGING CURRENT LOOP TO ADAPTER CURRENT LOOP TRANSITION. V = 12V, ADAPTER CURRENT LOOP TRANSITION. V = 12V, MAXSYSTEMVOLTAGE = 12.6V, V = 11V, SYSTEM MAXSYSTEMVOLTAGE = 12.6V, V...

  • Page 16: Revision History

    ISL9238EVAL1Z Typical Performance (Continued) FIGURE 19. BOOST MODE, OUTPUT VOLTAGE LOOP TO INPUT FIGURE 20. BOOST MODE, CHARGING CURRENT LOOP TO INPUT VOLTAGE LOOP TRANSITION. V = 5V, VOLTAGE LOOP TRANSITION. V = 5V, MAXSYSTEMVOLTAGE = 8.496V, V = 7V, MAXSYSTEMVOLTAGE = 8.496V, V...

  • Page 17: Sales Offices

    10. It is the responsibility of the buyer or distributor of Renesas Electronics products, or any other party who distributes, disposes of, or otherwise sells or transfers the product to a third party, to notify such third party in advance of the contents and conditions set forth in this document.

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