SG3844Y SEMICOA, SG3844Y Datasheet - Page 10
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SG3844Y
Manufacturer Part Number
SG3844Y
Description
Manufacturer
SEMICOA
Datasheet
1.SG3844Y.pdf
(12 pages)
Specifications of SG3844Y
Pwm Type
Current Mode PWM Controller
Number Of Pwm Outputs
1
On/off Pin
No
Adjustable Output
No
Switching Freq
500kHz
Duty Cycle
50%
Output Current
200mA
Synchronous Pin
No
Rise Time
50ns
Fall Time
50ns
Operating Temperature Classification
Commercial
Mounting
Through Hole
Pin Count
8
Package Type
CDIP
Lead Free Status / Rohs Status
Not Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
SG3844Y
Manufacturer:
NEC
Quantity:
5 510
10
SG1844/SG1845 Series
OSCILLATOR
The oscillator of the 1844/45 family of PWM's is programmed by
the external timing components (RT, CT) as shown in Figure 13.
FIGURE 12 — OSCILLATOR TIMING CIRCUIT
R
GND
F ≈
T
V
/C
REF
R
1.86
T
T
C
T
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
where R
C
T
U R R E N T
P
≥ 5kΩ
A P P L I C A T I O N I N F O R M A T I O N
R
C
R O D U C T I O N
T
T
- M
O D E
P W M C
D
100K
A T A
10K
1K
100
FIGURE 13 — OSCILLATOR FREQUENCY vs. R
O N T R O L L E R
S
H E E T
1K
Oscillator Frequency - (Hz)
10K
T
100K
FOR VARIOUS C
Copyright © 2000
Rev. 1.6c
1M
T