SI9118_11 Datasheet, PDF (6/11 Pages) Vishay Siliconix – Programmable Duty Cycle Controller

Si9118, Si9119
Vishay Siliconix
PIN CONFIGURATIONS AND ORDERING INFORMATION
+V_IN 1
PWM/PSM ₂
V_REF 3
NI 4
FB 5
COMP 6
SS/EN 7
C_{OSC 8}
SOIC
Si9118DY
Top View
16 VCC
15 DR
14 -V IN
13 DMAX
12 VSC
11 ICS
10 ILIMIT
9 ^ROSC
+V_IN 1
PWM/PSM ₂
V_REF 3
NI 4
FB 5
COMP 6
SS/EN 7
C_{OSC 8}
SOIC
Si9119DY
Top View
16 VCC
15 DR
14 -V IN
13 DMAX
12 SYNC
11 ICS
10 ILIMIT
9 ^ROSC
ORDERING INFORMATION
Part Number
Si9118DY
Si9118DY-T1
Si9118DY-T1-E3
Si9119DY
Si9119DY-T1
Si9119DY-T1-E3
Temperature Range
- 40 to 85 °C
Package
SOIC-16
PIN DESCRIPTION
Pin Number Symbol
Description
1
+V_IN
Input bus voltage ranging from 10 V to 200 V.
2
PWM/PSM ^{Connected to VREF forces the converter into PWM mode. Connected to -VIN forces the converter into PSM}
mode.
3
V_REF
4 V reference voltage. Decouple with 0.1 µF ceramic capacitor.
4
NI
Non-inverting input of an error amplifier.
5
FB
Inverting input of an error amplifier.
6
COMP
Error amplifier output for external compensation network.
7
SS/EN
Programmable soft-start with external capacitor or externally controlled disable mode.
8
C_OSC
External capacitor to determine the switching frequency.
9
R_OSC
External resistor to determine the switching frequency.
10
I_LIMIT
Pulse by pulse peak current limiting pin. When the current sense voltage exceeds the current limit threshold,
the gate drive signal is terminated. I_LIMIT is also used to sense the current in pulse skipping mode.
11
I_CS
Current sense input to control feedback response.
12
SYNC or V_SC
Si9118: slope compensation pin. Si9119: clock synchronization pin. Logic high to low transition from external
signal synchronizes the internal clock frequency.
13
D_MAX
Sets the maximum duty cycle. Internally, the maximum duty cycle is clamped to 80 %.
14
-V_IN
Single point ground.
15
D_R
Gate drive for the external MOSFET switch.
16
V_CC
Supply voltage for the IC after the startup transition.
www.vishay.com
Document Number: 70815
6
S11-0975–Rev. E, 16-May-11
This document is subject to change without notice.
THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000