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| 型号： | ISL6111EVAL2 |
| 厂商： | Intersil |
| 文件页数： | 5/26页 |
| 文件大小： | 0K |
| 描述： | EVALUATION BOARD 2 FOR ISL6111 |
| 标准包装： | 1 |
| 主要目的： | 电源管理，热交换控制器 |
| 已用 IC / 零件： | ISL6111 |
| 已供物品： | 板 |
Technical Brief 457
ISL6116 (-48V)
Figure 11 and 12 show the ISL6116 in -48V Low Side Switch
Application. The eval board uses a HIP5600 to bias the
ISL6116 12V higher than the -48V. Note C2 was intentionally
left empty. Tests were done at -36V to keep the power
dissipated to the load low. Results would be essentially the
same at -48V.
In Figure 13, notice soft-start ramp up of GATE upon LOGIN
is being driven low. Keep in mind that PGOOD is disabled in
ISL6116 (-48V) Figures
low side applications. Upon an OC at turn on, GATE begins
to soft-start, then attempts to regulate, then is shut down
(see Figure 14). Note CTIM’s behavior due to the eval board
setup (C2 DNP).
In Figure 15, the load is switched from an open to 2 ? . The
controller immediately pulls GATE down, CTIM up, and the
load is isolated. When LOGIN is forced high, the controller
shuts down (see Figure 16).
HI J2
LOAD
J3 LO
GND
J1
+VBUS
C1
R7
Q2
R1
R2
J4
-VBUS
-48V
C2 = EMPTY
C3
ISL6116
U1
R
G
1
R6
C2
R8
LOGIN
TP9
R10
R11
D2
DD1
3.3V
R5
R9
OFF
0-5V
OT1
FIGURE 11. ISL6116 EVAL BOARD SCHEMATIC
I CR = 2.4A
ON
FIGURE 12. ISL6116 EVAL BOARD PICTURE
I CR = 2.4A
Ch1 LOGIN
Ch4 I LOAD
Ch2 GATE
Ch1 LOGIN
Ch2 GATE
Ch3 CTIM
Ch4 I LOAD
Ch3 CTIM
FIGURE 13. TURN ON VIA LOGIN
5
FIGURE 14. TURN ON INTO OC
TB457.0
April 18, 2006
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