- 您现在的位置：买卖IC网 > PDF目录367266 > HUM-40U Analog IC PDF资料下载
参数资料
| 型号： | HUM-40U |
| 英文描述： | Analog IC |
| 中文描述： | 模拟IC |
| 文件页数： | 4/13页 |
| 文件大小： | 338K |
| 代理商： | HUM-40U |
B6-6
HUMMER SERIES
40 OR 70 WATT
DETAILED OPERATIONAL DESCRIPTION
The detailed operation of the HUMMER module is divided into 4
operations: Initialization and Charging, Normal Operation, Low
Line Operation, and Power Fail Operation. For details, refer to the
following text, Figure 4 (HUMMER Module Block Diagram) and
Figure 5 (HUMMER Module Signal Diagram).
1. I
NITIALIZATION AND
C
HARGING
As the input voltage ramps up to 8 to 10 volts, the internal
HUMMER module circuits are biased to provide correct output
states on all flags. As the input reaches 14 VDC, the Power Fail
flag (active low) is released, the voltage control switch (VCS) is
closed, and the module begins operating in a boost mode to
charge the external capacitor to 40 volts. At this point, if the recom-
mended connection has been made between the Capacitor
Charged pin and the inhibit pin of the converter as shown in Figure
3, all of the module energy is dedicated to charging the capacitor
and the converter will be inhibited until the capacitor charge
reaches 36 V. If this connection has not been made, the energy
available to charge the capacitor will be the difference between the
current required by the converter’s load and the current capacity of
the HUMMER module.
Note: The HUMMER module is rated at a total operating power
more than its output rating in order to allow it to both deliver a
full load and to continue charging the external capacitor (the
HUM-40, for example, is rated at 40 W output and 60 W total
operating power, allowing it to deliver 40 W to a load and charge
a capacitor at 10 to 20 J/sec). However, if the input voltage
ramps up slowly into a full converter load, the total power drawn
at low voltage could send the module into current limit which
would shut the unit down.
When the input voltage reaches approximately 22 VDC, the VCS
is opened, isolating the stored charge on the external capacitor
and allowing the converter to operate directly from the input power
bus via the external system diode (unless the converter is still
inhibited by the connection between the Capacitor Charged pin
and converter’s inhibit pin) while the capacitor continues to charge.
When the charge on the external capacitor reaches approximately
35 volts (80% of a full charge), the Capacitor Charged flag will be
asserted (removing the inhibit from the converter if applicable) and
the HUMMER module will be in normal operation.
EXT
C
+C
EXT
VCS
PWM
CAPACITOR
INHIBIT
POWER
CSENSE
+
–
+
–
+
–
+V
IN
IN
V
CASE
CILIMIT
F
IGURE
4: HUMMER M
ODULE
B
LOCK
D
IAGRAM
(IF USED)
+V
IN
IN
V
CASE
POWER
FAIL
INHIBIT
EXT
RETC
CCHARGED
VCS
+V
IN
INHIBIT
V
IN
RETURN
+V
OUT
OUT
RETV
COLOAD
28 VDC
28 VDC
HUMMER
HOLD-UP
MODULE
+C
EXT
1. EXTERNAL HOLDUP
CAPACITOR
C
EXT
1
F
IGURE
3: HUMMER M
ODULE
S
YSTEM
B
LOCK
D
IAGRAM
H
OLD
U
P
M
ODULE
相关PDF资料 |
PDF描述 |
|---|---|
| HUM-40U1 | Analog IC |
| HUM-70F | Analog IC |
| HUM-70F1 | Analog IC |
| HUM-70F2 | Analog IC |
| HUM-70F3 | Analog IC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| HUM-40U/883 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
| HUM-40U/ES | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
| HUM-40U1 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
| HUM-40U1/883 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
| HUM-40U1/ES | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
发布紧急采购，3分钟左右您将得到回复。