LTM8062IV#PBF Linear Technology, LTM8062IV#PBF Datasheet - Page 10

• Manufacturer Part Number: LTM8062IV#PBF
• Description: IC, BATT CHRG, Li-Ion, Li-Polymer, 2A, LGA77
• Manufacturer: Linear Technology

Specifications of LTM8062IV#PBF

• Battery Type: Li-Ion, Li-Polymer
• Input Voltage: 32V
• Battery Charge Voltage: 14.4V
• Charge Current Max: 2A
• Battery Ic Case Style: LGA
• No. Of Pins: 77
• No. Of Series Cells: 1

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
2. Apply the recommended C
3. Connect BIAS as indicated.
While these component combinations have been tested
for proper operation, it is incumbent upon the user to
verify proper operation over the intended system’s line,
load and environmental conditions. Bear in mind that the
maximum output current is limited by junction tempera-
ture, the relationship between the input and output voltage
magnitude and polarity and other factors. Please refer to
the graphs in the Typical Performance Characteristics
section for guidance.
Table 1. Recommended Component Values and Configuration
(T
*Operating range, V
capacitance is required.
V
LTM8062
10
IN
A
12.75 to 32
18.25 to 32
6.25 to 32
9.75 to 32
11.5 to 32
16.5 to 32
19.5 to 32
input voltage range and battery float voltage.
9.5 to 32
RANGE (V)*
= 25°C)
11 to 32
17 to 32
19 to 32
6 to 32
6 to 32
6 to 32
V
IN
14.08
14.42
BAT
7.05
12.3
12.6
13.5
3.6
4.1
4.2
4.7
7.2
8.2
8.4
9.4
must be 3.3V above V
(V)
4.7µF 1206 X7R 50V
4.7µF 1206 X7R 50V
4.7µF 1206 X7R 50V
4.7µF 1206 X7R 50V
4.7µF 1206 X7R 50V
4.7µF 1206 X7R 50V
4.7µF 1206 X7R 50V
4.7µF 1206 X7R 50V
4.7µF 1206 X7R 50V
4.7µF 1206 X7R 50V
4.7µF 1206 X7R 50V
4.7µF 1206 X7R 50V
4.7µF 1206 X7R 50V
4.7µF 1206 X7R 50V
IN
C
IN
and R
BAT
to start. Input bulk
ADJ
values.
R
1020
1090
1110
(kΩ)
TOP
274
312
320
357
530
549
626
642
715
942
965
ADJ1
BOTTOM
R
2870
1260
1150
(kΩ)
835
464
459
417
412
383
344
340
328
332
328
ADJ2
V
The LTM8062 is biased directly from the charger input sup-
ply through the V
currents, so a high quality low ESR decoupling capacitor
is recommended to minimize voltage glitches on V
4.7μF is typically adequate for most charger applications.
Reverse Protection Diode
The LTM8062 integrates a high voltage power Schottky
diode to provide input reverse voltage protection. The an-
ode of this diode is connected to V
connected to V
at each end; please see the Block Diagram.
Input Supply Voltage Regulation
The LTM8062 contains a voltage monitor pin that enables
programming a minimum operational voltage. There is
a 1% 100k resistor from V
resistor from V
of minimum input supply voltage, typically used to pro-
gram the peak power voltage for a solar panel. Maximum
charge current is reduced when the V
the regulation threshold of 2.7V.
If the V
cannot provide enough power to satisfy the requirements
of an LTM8062 charger, the input supply voltage will col-
lapse. A minimum operating supply voltage can thus be
programmed by monitoring the supply through a resistor
divider, such that the desired minimum voltage corresponds
to 2.7V at the V
mum output charge current to maintain the voltage on
V
IN
INREG
Input Supply
INREG
at or above 2.7V.
function is not used, and if the input supply
IN
IN
INREG
. There is a small amount of capacitance
IN
to the V
pin. This pin provides large switched
pin. The LTM8062 servos the maxi-
INREG
INREG
pin enables programming
to GND. Connecting a
INA
, and the cathode is
INREG
pin is below
8062fa
IN
.