MAX17015BETP+ Maxim Integrated Products, MAX17015BETP+ Datasheet

IC BATT CHARGER 1.2MHZ 20-TQFN

MAX17015BETP+

Manufacturer Part Number
MAX17015BETP+
Description
IC BATT CHARGER 1.2MHZ 20-TQFN
Manufacturer
Maxim Integrated Products
Datasheets

Specifications of MAX17015BETP+

Function
Charge Management
Battery Type
Multi-Chemistry
Voltage - Supply
8 V ~ 26 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
20-TQFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX17005/MAX17006/MAX17015 are high-frequen-
cy multichemistry battery chargers. These circuits fea-
ture a new high-frequency current-mode architecture
that significantly reduces component size and cost. The
charger uses a high-side MOSFET with n-channel syn-
chronous rectifier. Widely adjustable charge current,
charge voltage, and input current limit simplify the con-
struction of highly accurate and efficient chargers.
The charge voltage and charge current are set with
analog control inputs. The charge current setting can
also be adjusted with a PWM input. High-accuracy cur-
rent-sense amplifiers provide fast cycle-by-cycle cur-
rent-mode control to protect against short circuits to the
battery and respond quickly to system load transients.
In addition, the charger provides a high-accuracy ana-
log output that is proportional to the adapter current. In
the MAX17015, this current monitor remains active
when the adapter is absent to monitor battery dis-
charge current.
The MAX17005 charges three or four Li+ series cells,
and the MAX17006 charges two or three Li+ series
cells. The MAX17015 adjusts the charge voltage setting
and the number of cells through a feedback resistor-
divider from the output. All variants of the charger can
provide at least 4A of charge current with a 10mΩ
sense resistor.
The charger utilizes a charge pump to control an n-channel
adapter selection switch. The charge pump remains
active even when the charger is off. When the adapter
is absent, a p-channel MOSFET selects the battery.
The MAX17005/MAX17006/MAX17015 are available in
a small, 4mm x 4mm x 0.8mm 20-pin, lead-free TQFN
package. An evaluation kit is available to reduce
design time.
19-4041; Rev 0; 2/08
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Notebook Computers
Tablet PCs
Portable Equipment with Rechargeable Batteries
________________________________________________________________ Maxim Integrated Products
General Description
Applications
High-Performance Chargers
♦ High Switching Frequency (1.2MHz)
♦ Controlled Inductor Current-Ripple Architecture
♦ ±0.4% Accurate Charge Voltage
♦ ±2.5% Accurate Input-Current Limiting
♦ ±3% Accurate Charge Current
♦ Single-Point Compensation
♦ Monitor Outputs for
♦ Analog/PWM Adjustable Charge-Current Setting
♦ Battery Voltage Adjustable for 3 and 4 Cells
♦ Adjustable Battery Voltage (4.2V to 4.4V/Cell)
♦ Cycle-by-Cycle Current Limit
♦ Programmable Charge Current < 5A
♦ Automatic System Power Source Selection with
♦ Internal Boost Diode
♦ +8V to +26V Input Voltage Range
+ Denotes a lead-free package.
Pin Configuration and Minimal Operating Circuit appear at
end of data sheet.
MAX17005ETP+
MAX17006ETP+
MAX17015ETP+
Reduced BOM Cost
Small Inductor and Output Capacitors
±2.5% Accurate Input Current Limit
±2.5% Battery Discharge Current
AC Adapter Detection
(MAX17005) or 2 and 3 Cells (MAX17006)
Battery Short-Circuit Protection
Fast Response for Pulse Charging
Fast System-Load-Transient Response
n-Channel MOSFET
PART
(MAX17015 only)
1.2MHz Low-Cost,
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
Ordering Information
PIN-
PACKAGE
20 Thin QFN
(4mm x 4mm)
20 Thin QFN
(4mm x 4mm)
20 Thin QFN
(4mm x 4mm)
Features
T2044-3
T2044-3
T2044-3
CODE
PKG
1

Related parts for MAX17015BETP+

MAX17015BETP+ Summary of contents

Page 1

... An evaluation kit is available to reduce design time. Notebook Computers Tablet PCs Portable Equipment with Rechargeable Batteries ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. High-Performance Chargers ♦ High Switching Frequency (1.2MHz) ♦ ...

Page 2

Low-Cost, High-Performance Chargers ABSOLUTE MAXIMUM RATINGS DCIN, CSSP, CSSN, BATT, CSIN, CSIP, ACOK AGND .......................................................-0.3V to +30V BST to LDO.............................................................-0.3V to +30V CSIP to CSIN, CSSP to CSSN .............................. -0.3V to +0.3V IINP, FB, ACIN to AGND.............................-0.3V ...

Page 3

ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure DCIN CSSP unless otherwise noted. Typical values are at T PARAMETER ISET Input Bias Current ISET PWM Threshold ISET Frequency ISET Effective Resolution INPUT-CURRENT REGULATION Input Current-Limit Threshold ...

Page 4

Low-Cost, High-Performance Chargers ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure DCIN CSSP unless otherwise noted. Typical values are at T PARAMETER SWITCHING REGULATOR DHI Off-Time K Factor Sense Voltage for Minimum Discontinuous Mode Ripple ...

Page 5

ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure DCIN CSSP unless otherwise noted.) PARAMETER CHARGE-CURRENT REGULATION ISET Range Full Charge-Current Accuracy (CSIP to CSIN) Trickle Charge-Current Accuracy Charge-Current Gain Error Charge-Current Offset Error BATT/CSIP/CSIN Input Voltage ...

Page 6

Low-Cost, High-Performance Chargers ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure DCIN CSSP unless otherwise noted.) PARAMETER REFERENCES VAA Output Voltage VAA UVLO Threshold ACIN ACIN Threshold ACIN Threshold Hysteresis ACOK ACOK Sink Current SWITCHING ...

Page 7

Figure 1, adapter = 19V, battery = 10V, ISET = 1.05V, V IINP DC ERROR vs. SYSTEM CURRENT - SYSTEM CURRENT (A) ISET ...

Page 8

Low-Cost, High-Performance Chargers (Circuit of Figure 1, adapter = 19V, battery = 10V, ISET = 1.05V, V LDO LOAD REGULATION 5.50 5.45 5.40 5.35 5. LDO CURRENT (mA) V vs. ...

Page 9

... Battery Voltage Adjust Input. VCTL sets the number of cells and adjusts the voltage per cell. The 20 VCTL adjustment range is 4.2V to 4.4V per cell. See the Setting Charge Voltage section. — BP Backside Paddle. Connect the backside paddle to analog ground. Dual Mode is a trademark of Maxim Integrated Products, Inc. _______________________________________________________________________________________ 1.2MHz Low-Cost, High-Performance Chargers FUNCTION Pin Description /2. ...

Page 10

Low-Cost, High-Performance Chargers ADAPTER N3 R9 2MΩ 1μF R4 200kΩ R ACIN1 N4 BATT LDO 10kΩ R ACIN2 C2 R1 0.1μF 22.6kΩ C3 1μ PWM SIGNAL Figure 1. Typical Operating Circuit Detailed Description The MAX17005/MAX17006/MAX17015 include all ...

Page 11

CSSP CSA A = 17.5V/V CSSN GMS 60mV GND CC BATT CELL SELECT BDIV LOGIC GMV VCTL CSI V AA CSIP CSA A = 17.5V/V CSIN GMI PWM FILTER ISET Figure 2. Functional Diagram The MAX17005/MAX17006/MAX17015 feature a volt- age-regulation ...

Page 12

Low-Cost, High-Performance Chargers Setting Charge Voltage The VCTL input adjusts the battery-output voltage and determines the number of cells. For 3- and BATT 4-cell applications, use the MAX17005; for 2- and 3-cell applications, use the MAX17006. Use ...

Page 13

The PWM filter accepts the digital signal with a frequency from 128Hz to 500kHz. Zero duty cycle shuts down the MAX17005/MAX17006/MAX17015, and 99.5% duty cycle corresponds to full scale (60mV) across CSIP and CSIN. Choose a current-sense resistor (RS2) to ...

Page 14

Low-Cost, High-Performance Chargers RS1 15mΩ Q1a 10nF D1 CSSP CSSN BST C4 0.1μF MAX17015 DHI LX Figure 5. Current-Monitoring Design Battery Discharge IINP can also be used to monitor battery discharge cur- rent (see Figure 5). ...

Page 15

BDIV OVP SET POINT + 100mV CSI IMAX 11A CCMP LVC IMIN 1A ZCMP 1A CSSP OFF-TIME CSIN COMPUTE Figure 6. DC-DC Converter Functional Diagram The operation of the DC-to-DC controller is determined by the following five comparators as shown ...

Page 16

Low-Cost, High-Performance Chargers CC, CCI, CCS, and LVC Control Blocks The MAX17005/MAX17006/MAX17015 control input current (CCS control loop), charge current (CCI control loop), or charge voltage (CC control loop), depending on the operating condition. The three control loops, CC, ...

Page 17

CC Loop Compensation The simplified schematic in Figure 7 is sufficient to describe the operation of the controller’s voltage loop, CC. The required compensation network is a pole-zero pair formed with C and R . The zero is necessary CC ...

Page 18

Low-Cost, High-Performance Chargers small enough, its associated output zero has ESR a negligible effect near crossover and the loop-transfer- function can be simplified as follows × LTF GM OUT sC OUT Setting LTF ...

Page 19

Generally, a low gate charge high-side MOSFET is pre- ferred to minimize switching losses. However, the R required to stay within package power dissi- DS(ON) pation often limits how small the MOSFET can be. The optimum occurs when the switching ...

Page 20

Low-Cost, High-Performance Chargers For optimum size and inductor current ripple, choose LIR = 0.4, which sets the ripple current to 40% the MAX charge current and results in a good balance between inductor size and efficiency. Higher inductor values ...

Page 21

Minimize other trace lengths in the high-current paths. d) Use > 5mm wide traces in the high-current paths. e) Connect C to high-side MOSFET (10mm max IN length). f) Minimize the LX node (MOSFETs, rectifier cath- ode, inductor (15mm ...

Page 22

Low-Cost, High-Performance Chargers ADAPTER Pin Configuration TOP VIEW ACIN 17 MAX17005 MAX17006 MAX17015 CC 19 EXPOSED PADDLE VCTL THIN QFN 4mm x 4mm 22 ______________________________________________________________________________________ ...

Page 23

For the latest package outline information go to www.maxim-ic.com/packages.) ______________________________________________________________________________________ 1.2MHz Low-Cost, High-Performance Chargers Package Information 23 ...

Page 24

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 24 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2008 Maxim Integrated Products Package Information (continued registered trademark of Maxim Integrated Products, Inc ...

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