MAX11080 Datasheet, PDF (6/27 Pages) Maxim Integrated Products – 12-Channel, High-Voltage Battery-Pack Fault Monitor

12-Channel, High-Voltage Battery-Pack
Fault Monitor
PIN
31
34
35
36
37, 38
Pin Description (continued)
NAME
FUNCTION
TOPSEL
Input to Indicate Topmost Device in the Daisy Chain. This pin should be connected to AGND for all devices
except the topmost. For the top device, this pin should be connected to V_AA.
ALRM_U
Upper Port Alarm Input. This input receives the ALRM_L output signal from an upper neighboring module. It
swings between VDD_U and GND_U.
GND_U
Level-Shifted Upper Port Ground. Upper port-supply return and supply input for the charge pump and HV
supplies. This pin should be connected to the DCIN takeoff point on the battery stack as shown in the
application diagrams.
VDD_U
Level-Shifted Upper Port Supply. Upper port-supply output for the daisy-chained bus. This is a regulated
output voltage from the internal charge pump that is level-shifted above the DCIN pin voltage level. It
should be bypassed with a 1µF capacitor to GND_U.
CP-, CP+
Charge-Pump Capacitor. Negative/positive input for the internal charge pump. Connect a 0.01µF high-
voltage capacitor between CP+ and CP-.
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