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參數(shù)資料
| 型號： | LB11600JV |
| 元件分類： | 運(yùn)動控制電子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, 0.03 A, PDSO30 |
| 封裝： | 0.275 INCH, SSOP-30 |
| 文件頁數(shù)： | 15/30頁 |
| 文件大?。?/td> | 343K |
| 代理商： | LB11600JV |
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LB11600JV
No.8321-22/30
The time (n times the PWMIN period) required for the potential, which is increased by the V2 potential difference (
V)
on each input pulse, to exceed the threshold voltage (Vth = 1.25V) is the reset period (Trest).
V2 +
V + V ≥ 1.25V
Trest
≤ TPWMIN × n (s)
<PWMRE Reset Time Setting Example>
VCC = 5V, PWMIN = 25kHz, on duty ratio = 20%
PWMRE:
C = 2200pF, R = 180k
PWMIN = 25kHz = 40
s
t1 = 40
s × 0.2 = 8s
t2 = 40
s × 0.8 = 32s
V1 = (V0 - Ipwmre
× R) × e-t1/RC + Ipwmre × R
= (0 - 200
A × 180k) × 0.98 + (200A × 180k)
= - 35.28 + 36 = 0.72 (V)
V2 = V1
× e-t2/RC
= 0.72
× 0.922 = 0.664 (V)
Since
V (0.644) is added on each PWMIN input pulse, and
V2 +
V = 0.664 + 0.664 ≥ 1.25V
the threshold voltage (1.25V) will be exceeded on the second pulse.
From the formula for the on time: t1' = CR
× ln ((V0 – Ipwmre × R)/(V1 - Ipwmre × R))
Since the potential difference with respect to 1.25V due to the rise potential V2 of the second PWMIN pulse is 1.25 -
0.664 = 0.586V, 1.25V will be exceeded in the on duty state. Therefore,
t1' = 2200pF
× 180k × ln ((0.664 – 200A × 180k) / (1.25 – 200A × 180k))
= 396
s × ln (35.336/34.75) = 6.622s (s)
Thus the reset time Trest will be one PWMIN period plus t1'.
Trest = 40
s + 6.622s = 46.622s (s)
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參數(shù)描述 |
|---|---|
| LB11600JV_11 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Brushless Motor Predriver IC for Automotive Applications |
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