参数资料
型号: PWM5031-001-2S
元件分类: 稳压器
英文描述: 1 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, CDSO24
封装: 0.600 X 0.300 INCH, 0.130 INCH HEIGHT, HERMETIC SEALED, CERAMIC, SOP-24
文件页数: 4/19页
文件大小: 236K
代理商: PWM5031-001-2S
12
SCD5031 Rev L 11/3/08
Aeroflex Plainview
OUTPUT DRIVE
Dual push-pull outputs OutA and OutB are provided for driving off chip switches. The output stages are identical:
Totem Pole configuration
Break-before-make switching to prevent harmful cross-conduction spikes
Separate positive and negative supply connections to decouple power stage and sensitive logic
Near rail-to-rail voltage swing
±1A maximum peak current capability (capacitive load)
The outputs have two modes of control depending on whether the 50% toggle option is selected. In the case where the
50% pin is logic low, the outputs are in-phase with each other and the duty cycle is free to take on any value up to 100%.
However, when the 50% pin is asserted high (logic ''1''), the outputs become limited to a maximum 50% duty cycle by
turning off each output on every other clock period of the oscillator. In addition Output A and Output B will never turn
on during the same clock cycle, see Figure 7A below. This would lend itself to a two phase switching system that would
be 180° out of phase..
FIGURE 7A – Output Drive Options
OSC
OUT A
OUT B
OUT A
OUT B
MAX OUTPUT @ 50%
OUTPUT @ 25%
PIN 2 SET LOW, 100% MODE
PIN 2 SET HI, 50% MODE
OUT A
OUT B
MAX OUTPUT @ 100%
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