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SS6781ACSTB Datasheet(PDF) 16 Page - Silicon Standard Corp.

Part # SS6781ACSTB
Description  Battery Charger Controller
PDF  18 Pages
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Manufacturer  SSC [Silicon Standard Corp.]
Direct Link  http://www.siliconstandard.com
Logo SSC - Silicon Standard Corp.

SS6781ACSTB Datasheet(HTML) 16 Page - Silicon Standard Corp.

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SS6781A(G)
1/11/2005 Rev.2.10
TABLE 9
The Operating Mode of SS6781A
MODE pin
Mode
Function
VCC
Test
Safety timer period scaled
down to 1/32....etc.
Floating
Normal Normal operation
GND
AC
-
∆V detection disabled
The Mode of LED Display and Trickle Charge
The SS6781A provides two LED display modes
and
five-pulsed
trickle
charge
modes.
The
tri-level inputs, SEL1 and SEL2 pins, as in the
TABLE 6 determine the modes of LED display
and trickle charge.
TABLE 10 Mode of LED Display and Trickle
Charge
SEL1
SEL2
Trickle Charge
Duty
LED Display
Mode
VCC
VCC
Floating
GND
N/A
1/32
1/64
Type 1
Type 1
Type 1
Floating
VCC
Floating
GND
1/128
1/256
N/A
Type 1
Type 1
Type 2
GND
VCC
Floating
GND
1/32
1/64
1/128
Type 2
Type 2
Type 2
Display the Battery Charging Status
The
SS6781A
provides
two
open-drain
outputs, LED1 and LED2, to indicate the battery
charging status. Refer to the table of LED display
mode (TABLE 10), depending on the setting of
SEL1 and SEL2 pins, the outputs of LED1 and
LED2 pins are shown in the following table:
TYPE 1
Power
ON
Fast
Charging
Charge
Completed
Fault
Conditions
LED1
1Hz
ON
OFF
OFF
LED2
OFF
OFF
ON
OFF
TYPE 2
Power
ON
Fast
Charging
Charge
Completed
Fault
Conditions
LED1
1Hz
ON
OFF
4Hz
Flashing
LED2
1Hz
4Hz
Flashing
ON
OFF
Charging Current Control
As shown in the typical application circuit, the
SS6781A offers an open-drained output pin, ICON
pin, to control the charging current flow in fast
charge state and switch on to inhibit the charging
current flow in fault conditions. When fast charge is
completed, the SS6781A enters the trickle charge
mode. In trickle charge mode, the ICON pin output
switches with predetermined duty cycle. Refer to
the table of trickle charge mode (TABLE 6), the
duty cycle is determined by the setting of SEL1
and SEL2 pins. The following table summarizes
how ICON pin corresponds to various charging
states.
Power
ON
Fast
Charging
Charge
Completed
Fault
Conditions
ICON
ON
OFF
See pin 10
& 11
ON
Test Mode
Fig. 20 shows the timing diagram for externally
controlled PEAK, ADJ, VBT, VTS, SEL1 and
SEL2 pin voltages of a recommended SS6781A
test scheme, utilizing TEST mode function.
Output waveforms of LED1, LED2 and ICON of a
properly functioning SS6781A are also shown in
the figure.



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