MP2610 MPS, MP2610 Datasheet - Page 5

• Manufacturer Part Number: MP2610
• Description: 2a, 24v Input, 1.1mhz 1/2 - Cell Switching Li-ion Battery Charger
• Manufacturer: MPS

PIN FUNCTIONS
MP2610 Rev. 0.91
7/13/2010
Pin #
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
Exposed
CHGOK
VREF33
VREF25
COMPV
ACOK
COMPI
CELLS
Name
BATT
GND,
TMR
NTC
CSP
BST
Pad
SW
EN
MP2610 – 2A, 24V INPUT, 1.1MHz 1-2CELL SWITCHING LI-ION BATTERY CHARGER
IN
Description
Thermistor Input. Connect a resistor from this pin to the pin VREF33 and the Thermistor
from this pin to ground.
Valid Input Supply Indicator. A logic LOW on this pin indicates the presence of a valid
input supply.
Charging Completion Indicator. A logic LOW indicates charging operation. The pin will
become an open drain once the charging is completed or suspended.
Internal linear regulator 3.3V reference output. Bypass to GND with a 1μF ceramic
capacitor.
Internal linear regulator 2.5V reference output.
On/Off Control Input.
Command Input for the Number of Li-Ion Cells. Connect this pin to VREF33 for 2-cell
operation or ground the pin for 1-cell operation. Do not leave this pin float.
V-LOOP Compensation. Connect this pin with a capacitor and a resistor.
I-LOOP Compensation. Connect this pin with a capacitor and a resistor.
Positive Battery Terminal.
Battery Current Sense Positive Input. Connect a resistor RS1 between CSP and BATT.
The full charge current is:
Ground. This pin is the voltage reference for the regulated output voltage. For this reason
care must be taken in its layout. This node should be placed outside of the switching
diode (D2) to the input ground path to prevent switching current spikes from inducing
voltage noise into the part. Connect exposed pad to ground plane for optional thermal
performance.
Set time constant. 0.1μA current charges and discharges the external cap.
Bootstrap. This capacitor is needed to drive the power switch’s gate above the supply
voltage. It is connected between SW and BS pins to form a floating supply across the
power switch driver.
Switch Output.
Supply Voltage. The MP2610 operates from a 5V to 24V unregulated input to charge 1~2
cell li-ion battery. Capacitor is needed to prevent large voltage spikes from appearing at
the input.
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© 2010 MPS. All Rights Reserved.
www.MonolithicPower.com
I
CHG
( )
A
=
RS1
200mV
(
mΩ
)
.
5