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ZHCSMU0D July 2009 – December 2020 TPS23753A

PRODUCTION DATA

7.5 Electrical Characteristics: Controller Section Only

Unless otherwise noted: CS = APD = CTL = RTN, GATE open, R_FRS = 60.4 kΩ, R_BLNK = 249 kΩ, C_VB = C_VC = 0.1 μF, R_DEN = 24.9 kΩ, R_CLS open, V_VDD-VSS = 48 V, V_VDD1-RTN = 48 V, 8.5 V ≤ V_VC-RTN ≤ 18 V, –40°C ≤ T_J ≤ 125°C [V_SS = RTN and V_DD = V_DD1] or [V_SS = RTN = V_DD], all voltages referred to RTN. Typical specifications are at 25°C.

PARAMETER		TEST CONDITIONS	MIN	TYP	MAX	UNIT
V_C
UVLO_1	Undervoltage lockout	V_C rising	8.65	9	9.3	V
UVLO_H	Undervoltage lockout	Hysteresis⁽¹⁾	3.3	3.5	3.7	V
	Operating current	V_C = 12 V, CTL = V_B	0.4	0.58	0.85	mA
t_ST	Start-up time, C_VC = 22 μF	V_DD1 = 10.2 V, V_VC(0) = 0 V	50	85	175	ms
t_ST	Start-up time, C_VC = 22 μF	V_DD1 = 35 V, V_VC(0) = 0 V	30	48	85	ms
	Start-up current source - I_VC	V_DD1 = 10.2 V, V_VC = 8.6 V	0.44	1.06	1.8	mA
	Start-up current source - I_VC	V_DD1 = 48 V, V_VC = 0 V	2.5	4.3	6	mA
V_B
	Voltage	6.5 V ≤ V_C ≤ 18 V, 0 ≤ I_VB ≤ 5 mA	4.75	5.1	5.25	V
FRS
	Switching frequency	CTL= V_B, Measure GATE	223	248	273	kHz
	Switching frequency	R_FRS = 60.4 kΩ	223	248	273	kHz
D_MAX	Duty cycle	CTL= V_B, Measure GATE	76%	78.5%	81%
V_SYNC	Synchronization	Input threshold	2	2.2	2.4	V
CTL
V_ZDC	0% duty cycle threshold	V_CTL ↓ until GATE stops	1.3	1.5	1.7	V
	Soft-start period	Interval from switching start to V_CSMAX	400	800		μs
	Input resistance		70	100	145	kΩ
BLNK
	Blanking delay	In addition to t1	35	52	75	ns
		BLNK = RTN	35	52	75
		R_BLNK = 49.9 kΩ	41	52	63
CS
V_CSMAX	Maximum threshold voltage	V_CTL = V_B, V_CS ↑ until GATE duty cycle drops	0.5	0.55	0.6	V
t₁	Turnoff delay	V_CS = 0.65 V	25	41	60	ns
V_SLOPE	Internal slope compensation voltage	Peak voltage at maximum duty cycle, referred to CS	90	118	142	mV
I_{SL_EX}	Peak slope compensation current	V_CTL = V_B, I_CS at maximum duty cycle (ac component)	30	42	54	μA
	Bias current (sourcing)	Gate high, DC component of CS current	2	3	4.2	μA
GATE
	Source current	V_CTL = V_B, V_C = 12 V, GATE high, Pulsed measurement	0.3	0.46	0.6	A
	Sink current	V_CTL = V_B, V_C = 12 V, GATE low, Pulsed measurement	0.5	0.79	1.1	A
APD
V_APDEN	Threshold voltage	V_APD↑	1.42	1.5	1.58	V
V_APDH	Threshold voltage	Hysteresis⁽¹⁾	0.28	0.3	0.32	V
THERMAL SHUTDOWN
	Turnoff temperature		135	145	155	°C
	Hysteresis⁽²⁾			20		°C

(1) The hysteresis tolerance tracks the rising threshold for a given device.

(2) These parameters are provided for reference only, and do not constitute part of TI's published device specifications for purposes of TI's product warranty.