DS2788K Maxim Integrated, DS2788K Datasheet - Page 5

• Manufacturer Part Number: DS2788K
• Description: Power Management IC Development Tools
• Manufacturer: Maxim Integrated
• Series: DS2788r

Figure 1. Block Diagram
PIN
10
11
12
13
14
1
2
3
4
5
6
7
8
9
NAME
OVD
SNS
LED2
LED1
DV
LED5
LED4
LED3
V
OVD
VMA
PIO
SNS
V
DQ
V
PIO
DQ
V
DD
DD
SS
IN
SS
Display Driver. Connect to an LED connected to V
Display Driver. Connect to an LED connected to V
Display Ground. Ground connection for the LED display drivers. Connect to V
Power-Supply Input. Connect to the positive terminal of the battery cell through a decoupling network.
1-Wire Bus Speed Control. Input logic level selects the speed of the 1-Wire bus. Logic 1 selects overdrive (OVD)
and Logic 0 selects standard (STD) timing. On a multidrop bus, all devices must operate at the same speed.
Device Ground. Connect directly to the negative terminal of the battery cell. Connect the sense resistor
between V
Data Input/Output. 1-Wire data line, open-drain output driver. Connect this pin to the DATA terminal of the
battery pack. This pin has a weak internal pulldown (I
Voltage Measurement Active. Output is driven high before the start of a voltage conversion and driven low at
the end of the conversion cycle.
Sense Resistor Connection. Connect to the negative terminal of the battery pack. Connect the sense resistor
between V
Voltage Sense Input. The voltage of the battery cell is monitored through this input pin.
Programmable I/O Pin. Can be configured as input or output to monitor or control user-defined external
circuitry. Output driver is open drain. This pin has a weak internal pulldown (I
upon recognition of a rising edge, the fuel-gauge display is enabled.
Display Driver. Connect to an LED connected to V
LED4 configuration.
Display Driver. Connect to an LED connected to V
Display Driver. Connect to an LED connected to V
_______________________________________________________________________________________
V
POR
DS2788
SS
SS
INTERFACE
and SNS.
and SNS.
EEPROM
1-Wire
EN
Stand-Alone Fuel-Gauge IC with
BIAS/VREF
ACCUMULATED
CURRENT ADC
15-BIT + SIGN
CONTROL
CURRENT
STATUS
AND
FUNCTION
DD
DD
DD
DD
DD
for display of relative pack capacity.
for display of relative pack capacity.
for display of relative pack capacity. Leave floating in
for display of relative pack capacity.
for display of relative pack capacity.
PD
) for sensing pack disconnection from host or charger.
TIME BASE
LED Display Drivers
COMPENSATION
TEMPERATURE
RATE AND
VOLTAGE
TEMP
AND
ADC
SS
PD
DRIVERS
.
). When configured as an input,
LED
Pin Description
LED5
LED4
LED3
LED2
LED1
DV
VMA
V
V
IN
SS
SS
5