SI9124 Datasheet, PDF (5/16 Pages) Vishay Siliconix – 500-kHz Push-Pull DC-DC Converter With Integrated Secondary Synchronous Rectification Control

New Product
Si9124
Vishay Siliconix
SPECIFICATIONS^a
Parameter
Output A Primary Driver
Symbol
Output High Voltage
V_OH
Output Low Voltage
V_CC2 Current
Peak Output Source
Peak Output Sink
Rise Time
Fall Time
Output B Primary Driver
V_OL
I_CC5
I_SOURCE
I_SINK
t_r
t_f
Output High Voltage
V_OH
Output Low Voltage
Peak Output Source
Peak Output Sink
Rise Time
Fall Time
V_OL
I_SOURCE
I_SINK
t_r
t_f
Secondary_Synchronous Driver
Output High Voltage
Output Low Voltage
Leading Edge Delays
Trailing Edge Delays
Peak Output Source
Peak Output Sink
Rise Time
Fall Time
Voltage Mode
V_OH
V_OL
t_d1
t_d3
t_d2
t_d4
I_SOURCE
I_SINK
t_r
t_f
Error Amplifier
t_d1A
t_d2B
Current Mode
Current Amplifier
t_d3A
t_d4B
Test Conditions Unless Specified
CS1 = CS2 = 0 V, f_NOM = 500 kHz, V_IN = 48 V
V_INDET = 4.8 V; 10 V v V_CC v 13.2 V, V_CC2 = V_CC
Limits
- 40 to 85_C
Min^b Typ^c Max^b
Unit
Sourcing 10 mA
Sinking 10 mA
V_CC2 = 12 V, PGND₂ = 0 V
T_A = 25_C, C_OUTA = 3 nF, V_CC = 12 V, 20 - 80%
V_CC2 -
0.3
0.1
0.75
V
PGND₂
+ 0.3
1.55
1.1
mA
- 1.0
- 0.75
A
1.0
18
28
ns
22
28
Sourcing 10 mA
Sinking 10 mA
V_CC = 12 V, PGND = 0 V
T_A = 25_C, C_OUTB = 3 nF, V_CC = 12 V, 20 - 80%
V_CC -
0.3
V
0.3
- 1.0
- 0.75
A
0.75
1.0
19
28
24
28
ns
Sourcing 10 mA
Sinking 10 mA
V_CC -
0.4
V
0.4
T_A = 25_C, V_CC = 12 V, L_X = 48 V, See Figure 3
C_OUTA = C_OUTB = 3nF, C_{SEC_SYNC} = 0.3 nF
80
110
80
110
80
110
ns
80
110
V_CC = 12 V
- 100
mA
100
T_A = 25_C, C_{SEC_SYNC} = 0.3 nF, V_CC = 12 V, 20 - 80%
16
28
ns
17
28
Input to A-side switch off
Input to B-side switch off
t200
ns
t200
Input to A-side switch off
Input to B-side switch off
t200
ns
t200
Notes
a. Refer to PROCESS OPTION FLOWCHART for additional information.
b. The algebraic convention whereby the most negative value is a minimum and the most positive a maximum (- 40_ to 85_C).
c. Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing and are measured at V_CC = 12 V unless otherwise noted.
d. V_UVLO tracks V_REG1 by a diode drop.
e. Measured on OUT_A or OUT_B outputs.
f. Note total supply current drawn is I_CC3 plus I_CC5.
Document Number: 72099
S-03638—Rev. B, 20-Mar-03
www.vishay.com
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