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零件编号 | BIT3715 | ||
描述 | High Performance PWM Controller | ||
制造商 | Beyond Innovation Technology | ||
LOGO | |||
1 Page
Beyond Innovation Technology Co., Ltd.
BIT3715
BIT3715
High Performance PWM Controller
www.DataSheet4U.com
Preliminary
Version: 0.00
Please read the notice stated in this preamble carefully before
accessing any contents of the document attached.
Admission of BiTEK’s statement therein is presumed once the
document is released to the receiver.
碩頡科技 BiTEK
管 December 20, 2005 制
DCC CONTROLLED
‘05/11/30 Preliminary
Confidential, for authorized user only
page 1 of 11
Beyond Innovation Technology Co., Ltd.
BIT3715
Note 1. The output driver frequency is the half of the ramp wave frequency.
Note 2. Only verified by simulation. Not 100% tested.
Note 3. The voltages of the output driver OUT1 is pulled to GND and OUT2 is pulled to VDD in each off
states.
Timing Diagram
The timing of the 2nd low frequency PWM generator, ISEN and LOAD pin are as bellow: A 51Kohm
pulled-low resistor is connected on PWMOUT pin in this example.
CTPWM
PWMDC
ISEN
<1.3V
>1.3V
PWMOUT(MODE=”0”)
>0.1 us
PWMOUT(MODE=”1”)
LOAD
(SW close)
(SW open)
Fig. 3
BIT3715 uses fixed frequency driving methodology. The power switch is driven by fixed frequency PWM
controlled signal. The detail timing relationship is shown as bellow: The maximum duty cycle of OUT1 and
OUT1 are smaller than 50% with 180°phase difference.
www.DataSheet4U.com
Ramp Wave
Err_Amp Output
CMP_PWM Output
‘05/11/30 Preliminary
OUT1
OUT2
delay
delay
delay
Fig. 4
Confidential, for authorized user only
碩頡科技 BiTEK
管 December 20, 2005 制
DCC CONTROLLED
page 8 of 11
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页数 | 11 页 | ||
下载 | [ BIT3715.PDF 数据手册 ] |
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