MAX1613EEE-T Maxim Integrated, MAX1613EEE-T Datasheet - Page 5

• Manufacturer Part Number: MAX1613EEE-T
• Description: Battery Management
• Manufacturer: Maxim Integrated
• Series: MAX1612, MAX1613r

PIN
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
BBATT
NAME
DCMD
CCMD
BBON
PGND
FULL
GND
ISET
LBO
LRO
LBI
CC
CD
LRI
LX
FB
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Bridge-Battery Charge-Current Input. Connect a current-setting resistor from this input to a voltage
higher than the bridge battery. Maximum current rating is 10mA. Pulling ISET below 0.4V resets the
internal counter.
Bridge-Battery Connection. Bridge-battery charger output.
Step-Up DC-DC Converter N-Channel MOSFET Drain. The maximum operating range is 12V.
Open-Drain Low-Battery Detector Output. When V
V
Bridge-Battery On Input. When high, the DC-DC converter turns off. When pulled low through an
external resistor, the resistor sets the peak inductor current. The inductor current is approximately
42,000 times the current in the external resistor (R
Discharge Command Input. When low with CCMD high, the internal timer counts down at a
frequency set by the CD capacitor. When both DCMD and CCMD are low, discharge takes
precedence.
Charge Command Input. When low with DCMD high, the internal switch from ISET to BBATT is
closed, charging the bridge battery. CCMD is inhibited if DCMD is low. The internal timer counts up
at a frequency set by the CC capacitor.
Open-Drain Bridge-Battery Full Indicator Output. When the internal timer reaches all 1sec, FULL
goes high impedance.
Feedback Input of Step-Up DC-DC Converter. Regulates to 2V. Connect feedback resistors to set
output voltage (Figure 2).
Low-Battery-Detector Input. When LBI falls below 1.8V, LBO goes low and sinks current. When LBI
goes above 2.0V, LBO goes high impedance. Hysteresis is typically 200mV.
Ground
Charge Oscillator Capacitor Input. This capacitor programs the charging oscillator frequency,
which sets the time for the internal counter to reach all 1s. Determine the capacitor value by: CC
(in nF) = 4.3 · charge time (in hours).
Discharge Oscillator Capacitor Input. This capacitor sets the discharging oscillator frequency,
which determines the maximum time to decrement the counter from all 1s to all 0s. Calculate the
capacitor value as follows: CD (in nF) = 4.3 · discharge time (in hours).
Power Ground and Step-Up DC-DC Converter N-Channel MOSFET Source
5V (MAX1612) or 3.3V (MAX1613) Linear-Regulator Output. Bypass to GND with a 1µF capacitor.
Maximum external load current is 10mA.
Linear-Regulator Supply Input
LBI
Bridge-Battery Backup Controllers
rises above 2.0V, LBO becomes high impedance.
FUNCTION
LBI
BBON
falls below 1.8V, LBO sinks current. When
).
for Notebooks
Pin Description
5