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參數(shù)資料
| 型號(hào)： | PJ3845BCD |
| 元件分類(lèi)： | 穩(wěn)壓器 |
| 英文描述： | 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封裝： | PLASTIC, DIP-8 |
| 文件頁(yè)數(shù)： | 14/14頁(yè) |
| 文件大小： | 841K |
| 代理商： | PJ3845BCD |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)當(dāng)前第14頁(yè)
PJ3844B / PJ3845B
High Performance Current Mode Controller
9-14
2002.rev. A
FIGURE 20-EXTERNAL CLOCK
SYNCHRONIZATION
FIGURE 21-EXTERNAL DUTY CYCLE CLAMP AND
MULTI UNIT SYNCHRONIZATION
The diode clamp is required if the Sync amplitude is large enough to
the cause the bottom side of CT to go more than 300mV below
ground.
FIGURE 22-ADJUSTABLE REDUCTION OF CLAMP
LEVEL
1.44
RB
f=
DMAX=
(RA+RB)
RA+2RB
FIGURE 23-SOFT-START CIRCUIT
FIGURE 24-ADJUSTABLE BUFFERED REDUCTION
OF CLAMP LEVEL WITH SOFT-STAR
Isoft-Start=3600c in F
FIGURE 25-CURRENT SENSING POWER MOSFET
Virtually lossless current sensing can be achieved with the
implementation of a SENSEFET power switch.For proper operation
during over current conditions.a reduction of the Ipk(max) clamp
level must be implemented.Refer to Figure 22 and 24.
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