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參數(shù)資料
| 型號： | AIC1569 |
| 廠商： | Analog Integrations Corporation |
| 英文描述： | 5-bit DAC, Synchronous PWM Power Regulator |
| 中文描述： | 5位DAC，同步PWM功率調(diào)節(jié)器 |
| 文件頁數(shù)： | 6/7頁 |
| 文件大小： | 240K |
| 代理商： | AIC1569 |
AIC1569A
6
PIN 4: VID0
PIN 5: VID1
PIN 6: VID2
PIN 7: VID3
PIN 8: VID4
- 5-bit DAC voltage select pin. TTL
inputs used to set the internal
voltage reference VDAC. When
left
open,
these
internally pulled up to 5V and
provide logic ones. The level of
VDAC sets the converter output
voltage as well as the PGOOD
and OVP thresholds.
pins
are
Table 1 specifies the VDAC
voltage for the 32 combinations
of DAC inputs.
PIN 9:COMP
- External compensation pin. This
pin
is
connected
amplifier
output
comparator. An RC network is
connected
to
compensate the voltage-control
feedback loop of the converter.
to
error
PWM
and
FB
pin
to
PIN 10:FB
- The error amplifier inverting
input pin. The FB pin and COMP
pin are used to compensate the
voltage-control feedback loop.
PIN 11:GND
- Signal GND. It also serves as
the power GND for the upper
gate driver.
PIN 12:PGOOD- Power
good
indicator
pin.
PGOOD is an open drain output.
This pin is pulled low when the
converter output is
±
10% out of
the VDAC reference voltage.
Table 1. Output Voltage Program
VID4
VID3
VID2
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
1
1
1
1
1
1
1
1
VID1
0
0
1
1
0
0
1
1
0
0
1
1
0
VID0 VDAC
0
1
0
1
0
1
0
1
0
1
0
1
0
0
0
0
0
1
1
1
1
0
0
0
0
1
3.5V
3.4V
3.3V
3.2V
3.1V
3.0V
2.9V
2.8V
2.7V
2.6V
2.5V
2.4V
2.3V
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
2.2V
2.1V
2.0V
2.05V
2.00V
1.95V
1.90V
1.85V
1.80V
1.75V
1.70V
1.65V
1.60V
1.55V
1.50V
1.45V
1.40V
1.35V
1.30V
PIN 13:PHASE - Over current detection pin. Connect
the PHASE pin to source of the
external MOSFET. This pin detects
the voltage drop across the MOSFET
R
DS(ON)
for over-current protection.
PIN 14: UGATE- External MOSFET gate drive pin.
Connect UGATE to gate of the
external MOSFET.
PIN 15: BOOT - External
MOSFET
driver
power
supply pin. To convert 5V main power
to V
power by driving N-channel
MOSFET, supply voltage of no
higher than 12V is recommended
since the negative power terminal of
the internal driver is internally tied to
GND.
PIN 16:PGND - Driver power GND pin. PGND should
be connected to a low impedance
ground plane close to lower N-
MOSFET source.
PIN 17:LGATE - Lower N-MOSFET gate driver pin.
PIN 18: VCC
- The chip power supply pin. It also
serves as power supply for LGATE
driver. Recommended supply voltage
is 12V.
PIN 19:OVP
-Over voltage indicator pin. This pin
also provides a driver source current
to turn on an external SCR in the
event of an over voltage condition.
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