AN8018SA-E1V Panasonic - SSG, AN8018SA-E1V Datasheet - Page 18

• Manufacturer Part Number: AN8018SA-E1V
• Description: IC MULTI CONFIG ADJ 50MA 16SSOP
• Manufacturer: Panasonic - SSG
• Type: Step-Down (Buck), Step-Up (Boost), Invertingr

Specifications of AN8018SA-E1V

• Lead Free Status: Lead free
• Internal Switch(s): No
• Synchronous Rectifier: No
• Number Of Outputs: 2
• Voltage - Output: Adj to 15V
• Current - Output: 50mA
• Frequency - Switching: 20kHz ~ 1MHz
• Voltage - Input: 1.8 ~ 14 V
• Operating Temperature: -30°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-SSOP
• Power - Output: 135mW
• Other names: AN8018SAE1V; AN8018SAE1VTR

AN8018SA
I Application Notes (continued)
18
[7] Parallel synchronous operation of multiple ICs (continued)
2. About the operation of short-circuit protection at parallel synchronous operation
S.C.P.
DT1
FB1
Out1
FB2
DT2
Out2
S.C.P.
the timer latch short circuit protection of the IC is operated, the output of other ICs will be also shut down, then
enter into latch mode.
approximately 1.1 V and the oscillator stops.
of the FB1 terminal set by terminal voltage, and then output 2 stops by PWM1 circuit of inside. The channel 2 stops
output 2 by oscillator high-level detection comparator.
OSC
OSC
In the case of the operation in parallel, if the single output (or multiple outputs) of them is short-circuited and
In figure 8, if the IC-2 entered timer latch mode, Q1 turns on and the OSC terminal (pin 1) is fixed to
Then channel 1 of IC-1 becomes low level than the DT1 terminal (pin 6) voltage or high-level voltage (0.9 V)
And then, the IC-1 becomes short-circuit state and enters latch mode after a certain time.
It becomes the same operation in case of the IC-1 enters latch mode previously.
IC-1
IC-2
IC-2 side
output short-circuited
Figure 8. Operation of short-circuit protection at parallel synchronous operation
0.9 V
Q1
IC-2 latch
Oscillator high-level
detection comparator
1.19 V
The IC entering to the lach mode,
Q1 turns on and,
V
SDH00008CEB
OSC
Channel 2 goes off
at high
= V
= becomes approximately 1.1 V
REF
IC-1 latch
− V
CE(sat)
1.19 V
Since the OSC terminal voltage
becomes higher than
the DT1 terminal voltage,
the Out1 becomes fully off state.
Forced to be in off state
inside the IC