MAX6841HUKD4+T Maxim Integrated, MAX6841HUKD4+T Datasheet - Page 9

• Manufacturer Part Number: MAX6841HUKD4+T
• Description: Supervisory Circuits
• Manufacturer: Maxim Integrated
• Series: MAX6841, MAX6842, MAX6843, MAX6844, MAX6845r

Specifications of MAX6841HUKD4+T

• Number Of Voltages Monitored: 1
• Monitored Voltage: 0.9 V to 1.5 V
• Undervoltage Threshold: 1.275 V
• Overvoltage Threshold: 1.35 V
• Output Type: Active High, Active Low, Push-Pull
• Manual Reset: Resettable
• Watchdog: No Watchdog
• Battery Backup Switching: No Backup
• Power-up Reset Delay (typ): 2240 ms
• Supply Voltage - Max: 1.8 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SOT-23
• Chip Enable Signals: No
• Maximum Power Dissipation: 571 mW
• Minimum Operating Temperature: - 40 C
• Power Fail Detection: No
• Supply Current (typ): 8.1 uA
• Supply Voltage - Min: 0.75 V

Pack-short current fault is latched and is not reset until
the MAX1894/MAX1924 detect a reversal in the direc-
tion of current flow. A charger must be applied to
reverse the current flow (Figure 7).
Figure 2. Undervoltage and Overvoltage Protection Flow Chart
MAX1924 V
MAX1894 V
OV_HYT
OV_HYT
= 200mV
_______________________________________________________________________________________
= 0
TKO, CGO = H
RESET UVF
RESET OVF
Advanced Li+ Battery-Pack Protectors
NO
YES
NO
NO
RESET V
LATCH UVF = UVF + 1
LATCH OVF = OVF + 1
DSO, CGO, TKO = H
V
V
V
UV_TH
STANDBY = 79ms
SRC
V
CGO = DSO = H
OV_TH
V
CELL
SHUTDOWN
V
CELL
V
OV_TH
SRC
TKO = L
CC
OVF = 4
> V
UVF = 4
+ 0.1V
= 2.3V typ &
> V
= 4.25V typ
< V
B4P
> 4.5V
> V
YES
YES
YES
YES
YES
YES
OV_TH
NO
= 4.25V typ
UV_TH
B4P
+ 0.1V
NO
NO
NO
The MAX1894/MAX1924 offer the designer the flexibility
of two charging paths: a fast charging path and a trick-
le-charge path (see Figure 1). Trickle charging is
enabled and TKO is set low when one or more cells are
belows V
Figure 3. Shutdown and Control Pin Flow Charts
SHUTDOWN
DSO, CGO,
TKO = H
UV_TH
.
NO
NO
NO
Fast and Trickle-Charge Paths
NORMAL OPERATION
NORMAL OPERATION
DSO, CGO, TKO = H
DSO, CGO, TKO = H
V
SRC
SHDN = H
Design Procedure
CTL = H
> V
B4P
YES
YES
YES
+ 0.1V
SHUTDOWN PIN
CONTROL PIN
OPERATION
OPERATION
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