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TYN256P Datasheet

  • TYN256P

  • Energy Efficient, Low Power Off-line Switcher

  • 157.45KB

  • 20頁

  • POWERINT

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TNY256
Conditions
Parameter
Symbol
SOURCE = 0 V; T
j
= -40 to 125
擄C
See Figure 14
(Unless Otherwise Specified)
Min
Typ
Max
Units
OUTPUT (cont.)
DRAIN Supply
Voltage
Output EN/UV
Delay
Output Disable
Setup Time
Auto-Restart,
ON-Time
Auto-Restart
Duty Cycle
t
EN/UV
t
DST
t
AR
T
j
= 25
擄C
See Note 10
See Note 8
50
V
碌s
碌s
10
0.5
28.9
32.0
35.2
ms
DC
AR
16
20
24
%
NOTES:
1. For a threshold with a negative value, negative hysteresis is a decrease in magnitude of the corresponding threshold.
2. Total current consumption is the sum of I
S1
and I
DSS
when EN/UV pin is shorted to ground (MOSFET not switching)
and the sum of I
S2
and I
DSS
when EN/UV pin is open (MOSFET switching).
3. Since the output MOSFET is switching, it is difficult to isolate the switching current from the supply current at the
DRAIN. An alternative is to measure the BYPASS pin current at 6.2 V.
4. BYPASS pin is not intended for sourcing supply current to external circuitry.
5. See typical performance characteristics section for BYPASS pin start-up charging waveform.
6. For current limit at other di/dt values, refer to current limit vs. di/dt curve under typical performance
characteristics.
7. This parameter is derived from characterization.
8. This parameter is derived from the change in current limit measured at 5X and 10X of the di/dt shown in the I
LIMIT
specification.
9. Auto-restart on time has the same temperature characteristics as the oscillator (inversely proportional to
frequency).
B
8/99
11

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