SA5901 Datasheet, PDF (12/24 Pages) Silan Microelectronics Joint-stock – 4-CHANNEL MOTOR DRIVER FOR PORTABLE CD PLAYER

SA5901
Charging circuit
The power supply of the charging unit is CHGVCC pin (41-pin) and it is independent of any other circuit.
Charging current is set by the resistance between RCHG pin (33-pin) and GND. The charging current takes
constant current through SEL pin (42-pin).
This circuit has a private thermal shutdown circuit. When the chip temperature has been 150°C (typ.), the
charging current is cut. When the chip temperature has dropped to 120°C(typ.), the charging current begins to
flow.
TEST CIRCUIT (1)
Table of test circuit 1 switches position
Measuring
SW no
no.
1 2 3 4 5 6 7 8 9 10 11 12 13 14
1
-- -- -- -- -- -- -- -- -- -- -- -- -- --
2
-- -- -- -- -- -- -- -- -- -- -- -- -- --
3
-- -- -- B -- -- -- B -- -- -- -- -- --
4
-- -- -- B -- -- -- B -- -- -- -- -- --
5
-- -- -- -- -- -- -- -- -- -- A -- -- --
28
-- -- A -- -- -- -- -- -- -- -- -- -- --
29
-- -- A B -- -- -- -- -- -- --
-- --
30
-- -- A B -- -- -- -- -- -- -- -- -- --
(To be continued)
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.3 2006.02.27
Page 12 of 24