mc33253 Freescale Semiconductor, Inc, mc33253 Datasheet - Page 9

• Manufacturer Part Number: mc33253
• Description: Full Bridge Pre-driver
• Manufacturer: Freescale Semiconductor, Inc

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