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PDF ISL9238A Data sheet ( Hoja de datos )
| Número de pieza | ISL9238A | |
| Descripción | Buck-Boost Narrow VDC Battery Charger | |
| Fabricantes | Intersil | |
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DATASHEET
Buck-Boost Narrow VDC Battery Charger with SMBus
Interface and USB OTG
ISL9238, ISL9238A
The ISL9238 and ISL9238A are buck-boost Narrow Output
Voltage DC (NVDC) chargers. The ISL9238 and ISL9238A
provide the NVDC charging function, system bus regulation
and protection features for tablet, ultrabook, notebook, power
bank and any USB-C interface platform. Intersil’s advanced
R3™ Technology is used to provide high light-load efficiency
and fast transient response.
In Charging mode the ISL9238 and ISL9238A takes input power
from a wide range of DC power sources (conventional AC/DC
charger adapters, USB PD ports, travel adapters, etc.) and safely
charges battery packs with up to 4-series cell Li-ion batteries.
As a NVDC topology charger, it also regulates the system output to
a narrow DC range for stable system bus voltage. The system
power can be provided from the adapter, battery or a combination
of both. The ISL9238 and ISL9238A can operate with only a
battery, only an adapter or both connected. For Intel IMVP8
compliant systems the ISL9238 and ISL9238A includes PSYS
(System power monitor) functionality, which provides an analog
signal representing total platform power. The PSYS output will
connect to a wide range of Intersil IMVP8 core regulators to
provide an IMVP8 compliant power domain function.
The ISL9238 and ISL9238A support reverse buck, boost, or
buck-boost operation to input port from 2- to 4-cell batteries.
The ISL9238 and ISL9238A have serial communication via
SMBus/I2C that allows programming of many critical
parameters to deliver a customized solution.
The ISL9238A is exactly same as ISL9238, but it has different
SMBus addresses for customers who use two battery chargers
in one system.
Features
• Buck-boost NVDC charger for 1-, 2-, 3-, or 4-cell Li-ion batteries
• Input voltage range 3.2V to 23.4V (no dead zone)
• System output voltage 2.4V to 18.304V
• Autonomous charging option (automatic end of charging)
• System power monitor PSYS output, IMVP compliant
• Up to 1MHz switching frequency
• Adapter current and battery current monitor (AMON/BMON)
• PROCHOT# open-drain output, IMVP compliant
• Allows trickle charging of depleted battery
• 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 I2C compatible
• Package 4x4 32 Ld TQFN
Applications
• 1 to 4-cell tablet, ultrabook, notebook, power bank, and any
USB-C interface portable device requiring batteries
Related Literature
• For a full list of related documents please visit our web pages
- ISL9238, ISL9238A product pages
VADP
OPTIONAL
Rs1
Q1 Q4
L1
Q2 Q3
VSYS
CSIN
CSIP
ASGATE
ADP
ACIN
ACOK
PROCHOT#
AMON/BMON
BATGONE
OTGEN/CMIN
ISL9238
GND
VSYS
CSOP
CSON
BGATE
VBAT
OTGPG/CMOUT
PSYS
Rs2
VBAT
November 9, 2016
FN8877.2
1
FIGURE 1. TYPICAL APPLICATION CIRCUIT
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2016. All Rights Reserved
Intersil (and design) and R3 Technology are trademarks owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
1 page  
ISL9238, ISL9238A
Pin Descriptions
PIN NUMBER
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
PIN NAME
ASGATE
CSIN
CSIP
ADP
DCIN
VDD
ACIN
OTGEN/
CMIN
SDA
SCL
PROCHOT#
ACOK
BATGONE
OTGPG/
CMOUT
PROG
COMP
AMON/
BMON
PSYS
VBAT
BGATE
DESCRIPTION
Gate drive output to the P-channel adapter FET. The use of ASGATE FETs is optional, if it is not used, leave ASGATE pin
floating.
When ASGATE turns on, it is clamped 10V below ADP pin voltage.
Adapter current sense “-” input.
Adapter current sense “+” input. The modulator also uses this for sensing input voltage in forward mode and output
voltage in reverse mode.
Adapter input. Used to sense adapter voltage. When adapter voltage is higher than 3.2V, AGATE is turned on.
ADP pin is also one of the two internal low power LDO inputs.
Input of an internal LDO providing power to the IC. Connect a diode OR from adapter and system outputs. Bypass this
pin with an MLCC capacitor.
Output of the internal LDO; provide the bias power for the internal analog and digital circuit. Connect a 1µF ceramic
capacitor to GND.
If VDD is pulled below 2V more than 1ms, ISL9238 and ISL9238A will reset all the SMBus register values to the default.
Adapter voltage sense. Use a resistor divider externally to detect adapter voltage. The adapter voltage is valid if the ACIN
pin voltage is greater than 0.8V.
OTG function enable pin or stand-alone comparator input pin.
Pull high to enable OTG function. The OTG function is enabled when the control register is written to select OTG mode
and when the battery voltage is above 5.2V.
When OTG function is not selected, this pin is the general purpose stand-alone comparator input.
SMBus data I/O. Connect to the data line from the host controller or smart battery. Connect a 10k pull-up resistor
according to SMBus specification.
SMBus clock I/O. Connect to the clock line from the host controller or smart battery. Connect a 10k pull-up resistor
according to SMBus specification.
Open-drain output. Pulled low when ACHOT, DCHOT or Low_VSYS is detected. IMVP-8 compliant. SMBus command to
pull low with OTGCURRENT, BAGONE, ACOK, and general purpose comparator (refer to Table 15 on page 28).
Adapter presence indicator output to indicate the adapter is ready.
Input pin to the IC. Logic high on this pin indicates the battery has been removed. Logic low on this pin indicates the
battery is present.
BATGONE pin logic high will force BGATE FET to turn-off in any circumstances.
Open-drain output. OTG function output power-good indicator or the stand-alone comparator output.
When OTG function is enabled, low if OTG output voltage is not within regulation window.
When OTG function is not used, it is the general purpose comparator output.
A resistor from PROG pin to GND sets the following configurations:
1. Default number of the battery cells in series, 1-, 2-, 3-, or 4-cell.
2. Default switching frequency 733kHz or 1MHz.
3. Default adapter current limit value 0.476A or 1.5A.
4. Autonomous Charging mode enable or disable
Refer to Table 23 for programming options.
Error amplifier output. Connect a compensation network externally from COMP to GND.
Adapter current, OTG output current, battery charging current, or battery discharging current monitor output.
VAMON = 18x(VCSIP-VCSIN) for adapter current monitor
VOTGCMON = 18x(VCSIN-VCSIP) for OTG output current monitor
VBMON_DISCHARGING = 18x(VCSON-VCSOP) for battery discharging current monitor
VBMON_CHARGING = 36x(VCSOP-VCSON) for battery charging current monitor
Current source output that indicates the whole platform power consumption.
PSYS gain = 1.44µA/W (default) or 0.723µA/W
Battery voltage sensing. Used for trickle charging detection and Ideal Diode mode control. Connect to >1µF ceramic
capacitor from VBAT pin to GND.
VBAT pin is also one of the two internal low power LDO inputs.
Gate drive output to the P-channel FET connecting the system and the battery. This pin can go high to disconnect the
battery, low to connect the battery or operate in a Linear mode to regulate trickle charge current during trickle charge.
When BGATE turns on, it is clamped 10V below VSYS pin voltage.
Submit Document Feedback
5
FN8877.2
November 9, 2016
5 Page 
ISL9238, ISL9238A
Electrical Specifications Operating conditions: ADP = CSIP = CSIN = 5V and 20V, VSYS = VBAT = CSOP = CSON = 8V, unless otherwise
noted. Boldface limits apply across the junction temperature range, -10°C to +125°C unless otherwise specified. (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN MAX
(Note 8) TYP (Note 8) UNIT
Reverse AMON Gain
17.9 V/V
AMON Accuracy
VAMON = 17.9 * (CSIN - CSIP)
AMON Minimum Output Voltage
DISCHARGE CURRENT SENSE AMPLIFIER, Rs2 = 10mΩ
BMON Gain (Battery Discharging)
VCSIN - VCSIP = 80mV (4A), CSIP = 4V - 22V
VCSIN - VCSIP = 20mV (1A), CSIP = 4V - 22V
VCSIN - VCSIP = 10mV (0.5A), CSIP = 4V - 22V
VCSIN - VCSIP = 5.12mV (0.256A), CSIP = 4V - 22V
VCSIP - VCSIN = 0V
-2.5
-6.5
-12
-25
2.5 %
4.5 %
9%
25 %
30 mV
17.78
V/V
BMON Accuracy
VBMON = 17.9 * (VCSON - VCSOP)
BMON Gain (Battery Charging)
VCSON - VCSOP = 100mV (10A), VCSON = 8V
-2
2%
VCSON - VCSOP = 20mV (2A), VCSON = 8V
-7.0 -1.5 3.0
%
VCSON - VCSOP = 10mV (1A), VCSON = 8V
-10.5 -2.5
5.5
%
VCSON - VCSOP = 6mV (0.6A), VCSON = 8V
-17 -4 12 %
Limits apply across temperature range of 0°C to
+85°C
35.7
V/V
BMON Accuracy
VBMON = 35.7* (VCSON - VCSOP)
BMON Minimum Output Voltage
Discharging Current PROCHOT#
Threshold, Rs2 = 10mΩ
Discharging Current PROCHOT#
Threshold, Battery Only, Rs2 = 10mΩ
IDIS_HOT_TH
IDIS_HOT_TH
VCSOP - VCSON = 60mV (6A), VCSON = 8V
VCSOP - VCSON = 40mV (4A), VCSON = 8V
VCSOP - VCSON = 10mV (1A), VCSON = 8V
VCSOP - VCSON = 5mV (0.5A), VCSON = 8V
VCSOP - VCSON = 0V
DCProchot = 2.048A
DCProchot = 12A
DCProchot = 6A
-3
-4
-10
-25
1.77
2.08
3
4
10
25
30
2.39
%
%
%
%
mV
A
10.8
5.35
13.5
6.5
17
8
A
A
AMON/BMON Source Resistance
(Note 9)
5Ω
AMON/BMON Sink Resistance
(Note 9)
5Ω
BATGONE AND OTGEN
High-Level Input Voltage
0.9 V
Low-Level Input Voltage
0.4 V
Input Leakage Current
PROCHOT#
VBATGONE = 3.3V, 5V; VOTGEN = 3.3V, 5V
1 µA
PROCHOT# Debounce Time
Prochot# Debounce register Bit<1:0> = 11
0.85 1 1.15 ms
Prochot# Debounce register Bit<1:0> = 10
425 500 575 µs
PROCHOT# Duration Time
Prochot# Duration register Bit<2:0> = 011
8.5 10 11.5 ms
Prochot# Duration register Bit<2:0> = 001
17 20 23 ms
Low VSYS PROCHOT# Trip Threshold
VLOW_VSYS_HOT
Control1 register Bit<1:0> = 00
Control1 register Bit<1:0> = 01
5.8 6.0 6.2
6.1 6.3 6.5
V
V
Control1 register Bit<1:0> = 10
6.4 6.6 6.8
V
Control1 register Bit<1:0> = 11
6.7 6.9 7.1
V
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FN8877.2
November 9, 2016
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet ISL9238A.PDF ] | |
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