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参数资料
| 型号： | PC33253DW |
| 厂商： | Motorola, Inc. |
| 英文描述： | Full Bridge Pre-Driver |
| 中文描述： | 全桥预驱动器 |
| 文件页数： | 9/15页 |
| 文件大小： | 615K |
| 代理商： | PC33253DW |
MC33253
rev3.0 - 9/15
MC33253
Figure 6. Input Logic and Cross Conduction Suppression
Logic Inputs
Logic Input Voltage Range:
Absolute Max :
-0.3 V ... 10 V
Wake Up Function:
(G_EN)
4.5 V ... V
CC2
During Wake-Up the logic is supplied from the G_EN pin.
Low Drop Linear Regulator
The low drop linear regulator provides the 5.0 V for the logic section of the driver, the V
gs_ls
buffered at LR_OUT and the +13.5 V for the
charge pump, which generates the V
gs_hs
. The low drop linear regulator provides 3.5 mA average current per driver stage. If typically V
CC2
exceeds 14.5V the output is limited to 14V.
Charge Pump
The charge pump generates the high side driver supply voltage ( V
gs_hs
), buffered at C
CP_OUT
. The basic circuit (Fig 7), shows
charge pump without load:
Figure 7. Charge Pump Basic Circuit
When the oscillator is in low state (1), C
cp
is charged through D2 until its voltage reaches V
bat
-V
d2
. When the oscillator is in high
state (2), C
cp
is discharged though D1 in C
cp_out
, and final voltage of the charge pump, V
cp_out
is V
bat
+V
LR_OUT
- 2V
d
. The frequency of
the MC33253 oscillator is about 330 kHz.
IN_LS
/IN_LS
IN_HS
/IN_HS
/CCS
G_EN
BRG_EN
CCS
AND
AND
AND
AND
AND
AND
EN_CP/LDO
UV_OV
OR
OR
AND
AND
10 k
10 k
10 k
en2_hs
OUT_HS
G_LOW_H
G_LOW_LS
“
1
”
FET is Turned-Off
OUT_LS
en2_ls
drv_ls
en1_ls
en1_hs
“
1
”
Turn-On FET
“
1
”
Turn-On FET
“
1
”
FET is Turned-Off
“
1
”
Enable Charge Pump and LDO
{
“
1
”
Supply is ok
“
1
”
Charge Pump is Ready
“
0
”
Cross Conduction Suppression is Enabled
en2hs = G_LOW_LS, en2ls = G_LOW_HS
“
1
”
Cross Conduction Suppression is Disabled
en2hs =
“
1
”
, en2ls =
“
1
”
en1hs =
“
0
”
, en1ls =
“
0
”
RDY
Osc.
Vbat
V
CP_OUT
Ccp_out
V
LR_OUT
Ccp
D1
D2
A
(2)
(1)
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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