L6610D STMicroelectronics, L6610D Datasheet - Page 24

• Manufacturer Part Number: L6610D
• Description: IC CTRLR HOUSEKEEPING BCD 24SOIC
• Manufacturer: STMicroelectronics

Specifications of L6610D

• Applications: Programmable Housekeeping Controller
• Voltage - Supply: 4.2 V ~ 7 V
• Current - Supply: 5mA
• Operating Temperature: 0°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 24-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Input: -

L6610
Simply connecting the power supply outputs to the L6610 relevant pins ensures the protection against over/un-
dervoltage in the Main section; the protection against overcurrent can be achieved (for 12V and 5V or 3.3V)
adding a small sense resistor.
A crowbar on the auxiliary output is switched on through DFAULT in case of overvoltage.
The L6610 is supplied by the Auxiliary output; the signals sent to the primary side are:
– a "digital" ON/OFF signal through an optocoupler that drives the relevant pin of primary Main controller
– two analog signals that provide voltage feedback for both the Auxiliary and the Main section, driving the
In server's SMPS applications, a current sharing system is usually required to allow paralleling of several mod-
ules: the L6615 (ST's Current sharing IC, [1]) does the job providing an interface for this purpose (fig. 25) and
guaranteeing an homogeneous current distribution between the paralleled power supplies.
The voltage drop across the sense resistors for overcurrent detection can be also used whenever current shar-
ing is required for 5V (or 3.3V) and/or 12V: the L6615 has a differential sense amplifier whose inputs can be
connected (through two resistors) at the two sense resistor leads. The share bus, referred to ground, links all
the paralleled power supplies.
REFERENCES
[1] "L6615 - Load share controller" (Datasheet)
Figure 24. Detailed Secondary Side
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to switch the Main converter ON and OFF;
primary controller pins responsible for the duty cycle modulation.
M-FAULT
Binv
Bout
12Visns
DMON
DFAULT
Vdd
Aout
Ainv
3V3/5Visns
Cout
Cinv
L6610
PW-OK
PS-ON
PROG
ACsns
VREF
GND
GND
12V
3V3
-12
5V
-5
FAN
COM
+3.3V
+5V
+12V
-12V
+
-
-5V
+5Vaux