HA16116FP Datasheet, PDF (4/34 Pages) Hitachi Semiconductor – Switching Regulator for Chopper Type DC/DC Converter

HA16116FP/FPJ, HA16121FP/FPJ
Pin Functions
Pin No.
Symbol
Function
1
S.GND
Signal circuitry*¹ ground
2
C_T
Timing capacitance (triangle wave oscillator output)
3
R_T
Timing resistance (for bias current synchronization)
4
IN(+)1
Error amp. noninverting input (1)
Channel 1
5
IN(–)1
Error amp. inverting input (1)
6
E/O1
Error amp. output (1)
7
DB1
Dead band timer off period adjustment input (1)
8
CL1
Overcurrent detection input (1)
9
OUT1
PWM pulse output (1)
10
P.GND
Output stage*¹ ground
11
P.V_IN
Output stage*¹ power supply input
12
OUT2
PWM pulse output (2)
Channel 2
13
CL2
Overcurrent detection input (2)
14
DB2
Dead band timer off period adjustment input (2)
15
E/O2
Error amp. output (2)
16
IN(–)2
Error amp. inverting input (2)*²
17
ON/OFF
IC on/off switch input (off when grounded)
18
TIM
Setting of intermittent operation timing when overcurrent is detected
(collector input of timer transistor)
19
Vref
2.5 V reference voltage output
20
S.V_IN
Signal circuitry*¹ power supply input
Notes: 1. Here “output stage” refers to the power MOS FET driver circuits, and “signal circuitry” refers to all
other circuits on the IC. Note that this IC is not protected against reverse insertion, which can
cause breakdown of the IC between V_IN and GND. Be careful to insert the IC correctly.
2. Noninverting input of the channel 2 error amp is connected internally to Vref.
4