sc1437 Semtech Corporation, sc1437 Datasheet - Page 6

• Manufacturer Part Number: sc1437
• Description: Precision Voltage Detector With Programmable Trigger Voltage & Timer Delay
• Manufacturer: Semtech Corporation

JUMPER IN = INTERNAL VTRIP SELECT
JUMPER OUT = ADJUSTABLE VTRIP SELECT
POWER MANAGEMENT
Applications Information Continued
FIGURE 3: T
FIGURE 3: T
FIGURE 3: Trip Dela
FIGURE 3: T
FIGURE 3: T
2000 Semtech Corp.
Top Trace: Charger Voltage, 5V/div
Bottom Trace: VTRIP, 5V/div
Timebase: 20ms/div
rip Dela
rip Delay se
rip Dela
rip Dela
VBAT+
VTRIP
VBAT-
1
1
1
y se
y se
y set t
y se
t t t t
t t t to 80mS, JP3 & JP2 Open.
JP1
o 80mS, JP3 & JP2 Open.
o 80mS, JP3 & JP2 Open.
o 80mS, JP3 & JP2 Open.
o 80mS, JP3 & JP2 Open.
R1
576K
R2
1M
5
6
7
8
IRF7805
Q1
1
2
3
NO JUMPER = 80ms DELAY
40ms DELAY
1
1
0 DELAY
JP3
JP2
FIGURE 2
2
2
6
FIGURE 4: T
FIGURE 4: T
FIGURE 4: Trip dela
FIGURE 4: T
FIGURE 4: T
Top Trace: Charger Voltage, 5V/div
Bottom Trace: VTRIP, 5V/div
Timebase: 20ms/div
R4
100
0.1uF
C2
rip dela
rip dela
rip delay Se
rip dela
1
4
3
SEL
SENSE
OV
U2
SC1437
y Se
y Se
y Set t
y Se
V+
V-
5
2
t t t t
t t t to 40mS, JP2 Shor
o 40mS, JP2 Shor
o 40mS, JP2 Short t t t t ed.
o 40mS, JP2 Shor
o 40mS, JP2 Shor
R3
100
0.1uF
C1
www.semtech.com
SC1437
1
1
CHARGER+
ed.
ed.
ed.
ed.
CHARGER-