MAX17006BETP+ Maxim Integrated Products, MAX17006BETP+ Datasheet

IC BATT CHARGER 1.2MHZ 20-TQFN

MAX17006BETP+

Manufacturer Part Number
MAX17006BETP+
Description
IC BATT CHARGER 1.2MHZ 20-TQFN
Manufacturer
Maxim Integrated Products
Datasheets

Specifications of MAX17006BETP+

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 MAX17005B/MAX17006B/MAX17015B are high-fre-
quency multichemistry battery chargers. These circuits
feature 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 MAX17015B, this current monitor remains active
when the adapter is absent to monitor battery dis-
charge current.
The MAX17005B charges three or four Li+ series cells,
and the MAX17006B charges two or three Li+ series
cells. The MAX17015B adjusts the charge voltage set-
ting and the number of cells through a feedback resis-
tor-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 MAX17005B/MAX17006B/MAX17015B are avail-
able in a small, 4mm x 4mm x 0.8mm 20-pin, lead-free
TQFN package. An evaluation kit is available to reduce
design time.
19-4576; Rev 1; 7/09
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(Pb)-free/RoHS-compliant package.
* * EP = Exposed pad.
Pin Configuration and Minimal Operating Circuit appear at
end of data sheet.
MAX17005BETP+
MAX17006BETP+
MAX17015BETP+
(MAX17005B) or 2 and 3 Cells (MAX17006B)
n-Channel MOSFET
Reduced BOM Cost
Small Inductor and Output Capacitors
±2.5% Accurate Input Current Limit
±2.5% Battery Discharge Current
AC Adapter Detection
Battery Short-Circuit Protection
Fast Response for Pulse Charging
Fast System-Load-Transient Response
PART
(MAX17015B Only)
1.2MHz, Low-Cost,
Ordering Information
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
PIN-PACKAGE
20 TQFN-EP**
20 TQFN-EP**
20 TQFN-EP**
Features
1

Related parts for MAX17006BETP+

MAX17006BETP+ Summary of contents

Page 1

... Automatic System Power Source Selection with n-Channel MOSFET ♦ Internal Boost Diode ♦ +8V to +26V Input Voltage Range Applications PART MAX17005BETP+ MAX17006BETP+ MAX17015BETP+ + Denotes a lead(Pb)-free/RoHS-compliant package Exposed pad. Pin Configuration and Minimal Operating Circuit appear at end of data sheet. 1.2MHz, Low-Cost, ...

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 ...

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 Range ...

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 Sink Current SWITCHING REGULATOR ...

Page 7

Figure 1, adapter = 19V, battery = 10V, ISET = 1.05V, VCTL = AGND, T IINP DC ERROR vs. SYSTEM CURRENT - SYSTEM ...

Page 8

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

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 pullup resistor from LDO to . ...

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 MAX17005B/MAX17006B/MAX17015B include all ...

Page 11

CSSP CSA A = 17.5V/V CSSN GMS 60mV AGND 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 MAX17005B/MAX17006B/MAX17015B feature a voltage-regulation loop ...

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 MAX17005B; for 2- and 3-cell applications, use the MAX17006B. Use ...

Page 13

The PWM filter accepts the digital signal with a frequency from 128Hz to 500kHz. Zero duty cycle shuts down the MAX17005B/MAX17006B/MAX17015B, 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 0.1µF 1kΩ D1 CSSP CSSN BST C4 0.68µF MAX17015B DHI LX Figure 5. Current-Monitoring Design Battery Discharge IINP can also be used to monitor battery discharge cur- rent (see Figure ...

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 MAX17005B/MAX17006B/MAX17015B control input current (CCS control loop), charge current (CCI control loop), or charge voltage (CC control loop), depending on the operating condition. The three con- trol loops, ...

Page 17

The DHI and DLO outputs are optimized for driving moderate-sized power MOSFETs. The MOSFET drive capability is the same for both the low-side and high- sides switches. This is consistent with the variable duty factor that occurs in the notebook ...

Page 18

Low-Cost, High-Performance Chargers The following additional loss occurs in the low-side MOSFET due to the body diode conduction losses: = × BDY PEAK The total power low-side MOSFET dissipation is: ≈ ...

Page 19

Applications Information Setting Input Current Limit The input current limit should be set based on the cur- rent capability of the AC adapter and the tolerance of the input current limit. The upper limit of the input cur- rent threshold ...

Page 20

Low-Cost, High-Performance Chargers ADAPTER BATT TOP VIEW 20 ______________________________________________________________________________________ DCIN CSSP CSSN BST DHI LDO LX DLO V AA PGND AGND MAX17005B CSIP MAX17006B MAX17015B IINP CSIN VCTL BATT CC ISET ACIN ACOK ...

Page 21

Chip Information PROCESS: BiCMOS ______________________________________________________________________________________ 1.2MHz, Low-Cost, High-Performance Chargers Package Information For the latest package outline information and land patterns www.maxim-ic.com/packages. PACKAGE TYPE PACKAGE CODE 20 TQFN DOCUMENT NO. T2044-3 21-0139 21 ...

Page 22

... 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. 22 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2009 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc ...

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