TCA 3727G Infineon Technologies, TCA 3727G Datasheet - Page 3

• Manufacturer Part Number: TCA 3727G
• Manufacturer: Infineon Technologies

Specifications of TCA 3727G

• Packages: PG-DSO-24
• Ipeak: 2 x 1.0 A
• Inhibit: Y
• Iq (typ): 20.0 µA
• Mounting: SMT
• Technology: Bipolar

Figure 1
Table 1
Pin No.
1, 2, 23, 24
3
5, 6, 7, 8, 17, 18, 19,
20
4
10
9, 12
11
14
13, 16
15
21
22
Data Sheet
Pin Configuration (top view)
Pin Definitions and Functions
See
Input Phase 1; controls the current through phase winding 1. On H-potential the phase
current flows from Q11 to Q12, on L-potential in the reverse direction.
Ground; all pins are connected internally.
Oscillator; works at approx. 25 kHz if this pin is wired to ground across 2.2 nF.
Resistor
Push-pull outputs Q11, Q12 for phase 1 with integrated free-wheeling diodes.
Z-diode of approx. 7 V is integrated. In both cases block to ground directly on the IC with
a stable electrolytic capacitor of 10 F in parallel with a ceramic capacitor of 100 nF.
Push-pull outputs Q22, Q21 for phase 2 with integrated free wheeling diodes.
Inhibit input; the IC can be put on standby by low potential on this pin. This reduces the
current consumption substantially.
Input phase 2; controls the current flow through phase winding 2. On H-potential the
phase current flows from Q21 to Q22, on L potential in the reverse direction.
Function
Digital control inputs IX0, IX1 for the magnitude of the current of the particular phase.
Supply voltage; block to ground, as close as possible to the IC, with a stable electrolytic
capacitor of at least 10 F in parallel with a ceramic capacitor of 220 nF.
Logic supply voltage; either supply with 5 V or connect to +
Resistor
Table
R
R
2.
1
2
for sensing the current in phase 1.
for sensing the current in phase 2.
Phase 1
OSC
GND
GND
GND
GND
Q12
+
Q11
10
V
R
11
S
1
1
2
3
4
5
6
7
8
9
10
11
12
5
IEP00898
24
23
21
20
19
18
17
16
15
14
13
22
R
Phase 2
Inhibit
GND
GND
GND
GND
Q21
Q22
+
21
20
2
V
L
V
S
across a series resistor. A
Rev. 2.2, 2009-01-22
TCA3727G