TY72011 View Datasheet(PDF) - ON Semiconductor
Part Name
Description
Manufacturer
TY72011
ON Semiconductor
TY72011 Datasheet PDF : 13 Pages
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TY72011AP2
4x1N4007
R5
15
Universal Input
+ C1
10 mF
400 V
R8
TY72011AP2
22 k 1
14
2
13
3
12
4
11
5
10
6
9
7
8
R6
2.7 k
C12
1 nF
R2 D2
15 1N4148
+
C14
33 mF/35 V
M2
MTD1N60E
R4
6.8
D6
1N5819
C10 +
470 mF
10 V
L2
10 mH
5V
+
C11
47 mF
10 V
D7
4.3 V
IC4
SFH6156-2
R1
560
R3
3.3
Figure 1. A Typical Off-Line Adapter Application
PIN FUNCTION DESCRIPTION
Pin
Number
Pin Name
Function
1
HV
Start-up rail
2
NC
-
3
Demag
Zero primary-current
detection
4
FB
Feedback signal to
control the PWM
5
Ct
Timing capacitor
6
OVP
Overvoltage pin
7
NC
-
8
NC
-
9
NC
-
10
Gnd
The IC's ground
11
Isense
The primary-current
sensing pin
12
Drv
This pin drives the
external switcher
13
VCC
Powers the IC
14
NC
-
Description
Connected to the rectified HV rail, this pin provides a charging path to VCC
bulk capacitor.
-
This pin ensures the re-start of the main switcher when operating in free-run.
This level modulates the peak current level in free-running operation and
modulates the frequency in VFM operation.
By adding a capacitor from Ct to the ground, the user selects the minimum
operating frequency.
By applying a level of 2.8 V typical on this pin, the IC is permanently
latched-off until VCC falls below UVLOL.
-
-
-
-
This pin senses the primary current via an external shunt resistor.
The IC is able to deliver or absorb 250 mA peak currents while delivering a
clamped driving signal.
A positive voltage up to 40 V typical can be applied upon this pin before the
IC stops.
-
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