LTM8062EVPBF LINER [Linear Technology], LTM8062EVPBF Datasheet

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LTM8062EVPBF

Manufacturer Part Number
LTM8062EVPBF
Description
32VIN, 2A ?Module Power Tracking Battery Charger
Manufacturer
LINER [Linear Technology]
Datasheet
TYPICAL APPLICATION
FEATURES
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APPLICATIONS
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6V TO 32V
Industrial Handheld Instruments
12V to 24V Automotive and Heavy Equipment
Desktop Cradle Chargers
Solar Power Battery Charging
Complete Battery Charger System
Input Supply Voltage Regulation Loop for Peak
Power Tracking in MPPT (Maximum Peak Power
Tracking) Solar Applications
Wide Input Voltage Range: 4.95V to 32V
(40V Abs Max)
2A Charge Current
Resistor Programmable Float Voltage Up to 14.4V
Accommodates Li-Ion/Polymer, LiFePO
Integrated Input Reverse Voltage Protection
User Selectable Termination: C/10 or Termination
Timer
0.75% Float Voltage Reference Accuracy
9mm × 15mm × 4.32mm LGA Package
V
IN
4.7μF
2A LiFePO
V
V
V
RUN
TMR
NTC
INA
IN
INREG
4
μModule Battery Charger
LTM8062
GND
FAULT
CHRG
8062 TA01a
BIAS
BAT
ADJ
4
, SLA
274k
2.87M
1-CELL
LiFePO
(3.6V)
4
DESCRIPTION
The LTM
tracking battery charger. The LTM8062 provides a con-
stant-current/constant-voltage charge characteristic, a 2A
maximum charge current, and employs a 3.3V float voltage
feedback reference, so any desired battery float voltage up
to 14.4V can be programmed with a resistor divider.
The LTM8062 employs an input voltage regulation loop,
which reduces charge current if the input voltage falls below
a programmed level, set with a resistor divider. When the
LTM8062 is powered by a solar panel, this input regulation
loop is used to maintain the panel at peak output power.
The LTM8062 also features preconditioning trickle charge,
bad battery detection, a choice of termination schemes
and automatic restart.
The LTM8062 is packaged in a thermally enhanced, com-
pact (9mm × 15mm × 4.32mm) over-molded land grid
array (LGA) package suitable for automated assembly
by standard surface mount equipment. The LTM8062 is
RoHS compliant.
L, LT, LTC, LTM, Linear Technology, the Linear logo and μModule are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners.
32V
Tracking Battery Charger
®
2500
2000
1500
1000
IN
8062 is a complete 32V
500
0
, 2A µModule Power
Charge Current vs Battery Voltage
0
PRECONDITION
1
BATTERY VOLTAGE (V)
TERMINATION
2
NORMAL CHARGING
IN
, 2A μModule
3
LTM8062
8062 TA01b
4
®
power
1
8062f

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LTM8062EVPBF Summary of contents

Page 1

FEATURES n Complete Battery Charger System n Input Supply Voltage Regulation Loop for Peak Power Tracking in MPPT (Maximum Peak Power Tracking) Solar Applications n Wide Input Voltage Range: 4.95V to 32V (40V Abs Max Charge Current n ...

Page 2

LTM8062 ABSOLUTE MAXIMUM RATINGS (Note ...................................................................40V INA IN , RUN, CHRG, FAULT ......................V V INREG TMR, NTC ................................................................2.5V BAT ...........................................................................15V BIAS ..........................................................................10V ADJ .............................................................................5V Maximum Internal Operating Temperature (Note 2) ................................................................. 125°C Maximum Body Solder Temperature ...

Page 3

ELECTRICAL CHARACTERISTICS operating temperature range, otherwise specifications are at T PARAMETER V Maximum Operating Voltage IN V Start Voltage IN V OVLO Threshold IN V OVLO Hysteresis IN V UVLO Threshold IN V UVLO Hysteresis Diode ...

Page 4

LTM8062 TYPICAL PERFORMANCE CHARACTERISTICS Efficiency 4.2V Float BAT 12V INA 24V INA 500 1000 1500 I (mA) BAT 8062 G01 Efficiency ...

Page 5

TYPICAL PERFORMANCE CHARACTERISTICS Input Current 4.2V Float BAT 900 800 700 V = 12V INA 600 500 400 300 V = 24V INA 200 100 0 0 500 1000 1500 I (mA) BAT 8062 G10 Input Current ...

Page 6

LTM8062 TYPICAL PERFORMANCE CHARACTERISTICS Temperature Rise vs I 7.2V Float Voltage 24V INA 500 1000 I (mA) BAT Temperature Rise vs I 14.4V Float Voltage ...

Page 7

PIN FUNCTIONS the CHRG pin becomes high impedance. If the internal timer is used for termination, the pin stays low during the charg- ing cycle until the charge current drops below a C/10 rate, approximately 200mA, even though the charger ...

Page 8

LTM8062 BLOCK DIAGRAM V INA 0.1μF 0.1μF V INREG INTERNAL COMPENSATION RUN ADJ TMR NTC OPERATION The LTM8062 is a complete monolithic, mid-power, power tracking battery charger, addressing high input voltage ap- plications with solutions that use a minimum of ...

Page 9

OPERATION which termination scheme is used. When the timer-based scheme is used, the LTM8062 also supports bad battery detection, which triggers a system fault if a battery stays in precondition mode for more than one-eighth of the total programmed charge ...

Page 10

LTM8062 APPLICATIONS INFORMATION For most applications, the design process is straight forward, summarized as follows: 1. Look at Table 1 and find the row that has the desired input voltage range and battery float voltage. 2. Apply the recommended C ...

Page 11

APPLICATIONS INFORMATION circuitry. For proper operation, it must be powered by at least 2.8V and no more than the absolute maximum rat- ing of 10V. In most applications, connect BIAS to BAT. If there is no BIAS supply available or ...

Page 12

LTM8062 APPLICATIONS INFORMATION For example, given a common 36-cell solar panel that has the following specified characteristics: Open Circuit Voltage ( 21.7V OC Maximum Power Voltage ( 17.6V MP Open-Circuit Voltage Temperature Coefficient (V = –78mV/°C ...

Page 13

APPLICATIONS INFORMATION BAT 196k LTM8062 69k 198k ADJ 69k Figure 6. Thermistor-Based Temperature Compensation Network Programs V to Closely Match Ideal Lead-Acid Float Charge Voltage for 6-Cell Charger voltage characteristic is slightly nonlinear. This nonlinear characteristic follows the relation: –5 ...

Page 14

LTM8062 APPLICATIONS INFORMATION When charging rate commonly set to three EOC hours, which requires a 0.68μF capacitor. The CHRG status pin continues to signal charging, regard- less of which termination scheme is used. When timer ...

Page 15

APPLICATIONS INFORMATION (OPTIONAL) C BAT THERMAL VIAS PCB Layout Most of the headaches associated with PCB layout have been alleviated or even eliminated by the high level of LTM8062 integration. The LTM8062 is nevertheless a switching power supply, and care ...

Page 16

LTM8062 APPLICATIONS INFORMATION to add an electrolytic bulk capacitor to the V capacitor’s relatively high equivalent series resistance damps the circuit and eliminates the voltage overshoot. The extra capacitor improves low frequency ripple filter- ing and can slightly improve the ...

Page 17

APPLICATIONS INFORMATION JUNCTION JUNCTION-TO-CASE (BOTTOM) RESISTANCE μMODULE DEVICE TYPICAL APPLICATIONS Basic 2A, 2-Cell LiFePO V IN 9.5V TO 32V DC 4.7μF 2A Solar Panel Power Manager with 8.4V Lithium Ion Battery Pack and 16V Peak Power Tracking V IN SOLAR ...

Page 18

LTM8062 PACKAGE DESCRIPTION bbb // 3.810 2.540 1.5875 1.270 0.9525 0.000 1.270 2.540 3.4925 3.810 4.1275 8062f ...

Page 19

PACKAGE DESCRIPTION PIN NAME PIN A1 GND B1 A2 GND B2 A3 GND B3 A4 GND B4 A5 GND B5 A6 BAT B6 A7 BAT B7 PIN NAME PIN G1 GND H1 G2 GND H2 G3 GND H3 G4 GND ...

Page 20

LTM8062 TYPICAL APPLICATION 2A Solar Panel Power Manager for Charging 2-Cell 8.4V Lithium-Ion Battery, Featuring Three Hour Charge Time and 16V Peak Power Tracking. Battery Powers Two μModule Regulators V IN SOLAR POWER UNIT 499k 4.7μF 0.68μF 100k RELATED PARTS ...

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