AN1139 STMicroelectronics, AN1139 Datasheet - Page 39

• Manufacturer Part Number: AN1139
• Description: L6254 - L6268 - L6269 12V DISK DRIVE POWER COMBO IC
• Manufacturer: STMicroelectronics

Figure 22. Typical Application Circuit
6.3
The STMicroelectronics Smart Power development System is a family of hardware and software tools that are
used with a personal computer to develop applications of smart power ICs. Using this tool engineers can quickly
evaluate smart power ICs and optimize their application designs obtaining the best possible performance and
reliability in the shortest time.
The SPDS is based on a IBM PC AT compatible, as shown in Figure #23. A PC interface board, suitable for any
data transfer operation from or to the PC, is inserted into one PC ISA expansion slot and interface the computer
with the external devices.
In addition, an evaluation board specific for one or more STMicroelectronics products, controlled by the SPDS
software installed on the PC, provide the direct user application management.
Designed for one or more specific STMicroelectronics Smart Power products, the SPDS software provides a
set of tools dedicated to the design development and optimization of applications which make use of the STMi-
croelectronics Smart Power ICs. SPDS software permits the evaluation and optimization of external compo-
nents. SPDS software support the SPDS hardware and permits the driving of the application to test, modify
and optimize in real time the application parameters.
12V_VCC
SMART POWER DEVELOPMENT SYSTEM (SPDS)
5 V _ V D D
18.2K
+
2 2 u F
35V
(1)
2 0 K
S T N 4 N E 0 3
2 . 2 u F
16V (1)
1 u F
1 2 V _ V C C
5K (4)
1 N 4148
+
220pF (3)
51K
1N 414 8
1 0 0 n F
2 . 2 u F
1 0 0 n F
10nF (4)
V C C
1 5 K
5 0 K
2 2 u F
25V
(1)
4 7 n F
(2)
24
23
36
12
44
42
33
19
35
40
+
3
1 0 0 n F
C S
C P
P O R _ D E L A Y
B R K _ C A P
P W M / S L E W
S P N _ C O M P
A G N D
S W 1
V D D
TR_5V
TR_12V
Voice Coil Ground
Power Ground
0.3(1W)
L6254-L6268-L6269
1 0 K
0.18nF
TQFP44
1 . 8 n F
C T A P
6 2 K
O U T _ A
Digital Ground
Analog Ground
OUT_B
1 0 K
OUT_C
AN1139 APPLICATION NOTE
F L L _ F I L T E R
S E N S E _ I N +
S E N S E _ I N -
F L L _ R E S
V C M _ A +
VCM_A-
INDEX
F C O M
P O R B
V C C
V C C
26
30
27
29
21
32
25
31
11
1
34
VCM_A-
0.25(1W)
6 2 K
V C C
4.7K
V C M _ A +
1 u F
INDEX
F C O M
P O R B
S Y S _ C L K
S C L K
S D A T A
S D E N
5 V _ V D D
430K
1 0 0 n F
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