M62281P Просмотр технического описания (PDF) - Renesas Electronics
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M62281P Datasheet PDF : 13 Pages
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M62281P/FP
Block
Item
Output Output low voltage
Output high voltage
Output voltage rise time
Output voltage fall time
Symbol
VOL1
VOL2
VOH1
VOH2
TRISE
TFALL
Min.
12.0
11.5
(Ta = 25°C, VCC = 14 V, unless otherwise noted)
Limits
Typ. Max. Unit Test Conditions
0.04 0.4
V VCC = 14 V,
IO = 10 mA
0.3
1.4
V VCC = 14 V,
IO = 100 mA
12.7
V VCC = 14 V,
IO = −10 mA
12.5
V VCC = 14 V,
IO = −100 mA
50
ns No load
35
ns No load
Function Description and Application
EA IN, EA OUT Terminal
Circuit for EA OUT terminal is connected to constant current load (370 µA Typ.) shown in figure 1. Output voltage of
error amp. is controlled by the output transistor to provide current-sense comp. with the controlled voltage.
EA OUT
370 µA
To current-sense
comp.
Figure 1 Circuit Diagram of EA OUT Terminal
1. Peripheral circuit of Error Amp
Detected voltage divided by R1 and R2 is input to EA IN terminal in such case as fly-back system where VCC line
voltage is proportional to output voltage, or in the case that the voltage detection is made on the primary side. In
this case operating region is set by R1 and R2, and AC gain by R1//R2, RF.
From detecting voltage
Reference voltage (2.5 V)
R1
+
−
EA IN
EA
R2
OUT
RF
Figure 2 Method to Detect The Voltage on The Primary Side
REJ03D0840-0201 Rev.2.01 Nov 14, 2007
Page 5 of 12
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